1 /*
2 * RADIUS authentication server
3 * Copyright (c) 2005-2009, 2011-2019, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10 #include <net/if.h>
11 #ifdef CONFIG_SQLITE
12 #include <sqlite3.h>
13 #endif /* CONFIG_SQLITE */
14
15 #include "common.h"
16 #include "radius.h"
17 #include "eloop.h"
18 #include "eap_server/eap.h"
19 #include "ap/ap_config.h"
20 #include "crypto/tls.h"
21 #include "radius_server.h"
22
23 /**
24 * RADIUS_SESSION_TIMEOUT - Session timeout in seconds
25 */
26 #define RADIUS_SESSION_TIMEOUT 60
27
28 /**
29 * RADIUS_SESSION_MAINTAIN - Completed session expiration timeout in seconds
30 */
31 #define RADIUS_SESSION_MAINTAIN 5
32
33 /**
34 * RADIUS_MAX_SESSION - Maximum number of active sessions
35 */
36 #define RADIUS_MAX_SESSION 1000
37
38 /**
39 * RADIUS_MAX_MSG_LEN - Maximum message length for incoming RADIUS messages
40 */
41 #define RADIUS_MAX_MSG_LEN 3000
42
43 static const struct eapol_callbacks radius_server_eapol_cb;
44
45 struct radius_client;
46 struct radius_server_data;
47
48 /**
49 * struct radius_server_counters - RADIUS server statistics counters
50 */
51 struct radius_server_counters {
52 u32 access_requests;
53 u32 invalid_requests;
54 u32 dup_access_requests;
55 u32 access_accepts;
56 u32 access_rejects;
57 u32 access_challenges;
58 u32 malformed_access_requests;
59 u32 bad_authenticators;
60 u32 packets_dropped;
61 u32 unknown_types;
62
63 u32 acct_requests;
64 u32 invalid_acct_requests;
65 u32 acct_responses;
66 u32 malformed_acct_requests;
67 u32 acct_bad_authenticators;
68 u32 unknown_acct_types;
69 };
70
71 /**
72 * struct radius_session - Internal RADIUS server data for a session
73 */
74 struct radius_session {
75 struct radius_session *next;
76 struct radius_client *client;
77 struct radius_server_data *server;
78 unsigned int sess_id;
79 struct eap_sm *eap;
80 struct eap_eapol_interface *eap_if;
81 char *username; /* from User-Name attribute */
82 char *nas_ip;
83 u8 mac_addr[ETH_ALEN]; /* from Calling-Station-Id attribute */
84
85 struct radius_msg *last_msg;
86 char *last_from_addr;
87 int last_from_port;
88 struct sockaddr_storage last_from;
89 socklen_t last_fromlen;
90 u8 last_identifier;
91 struct radius_msg *last_reply;
92 u8 last_authenticator[16];
93
94 unsigned int remediation:1;
95 unsigned int macacl:1;
96 unsigned int t_c_filtering:1;
97
98 struct hostapd_radius_attr *accept_attr;
99
100 u32 t_c_timestamp; /* Last read T&C timestamp from user DB */
101 };
102
103 /**
104 * struct radius_client - Internal RADIUS server data for a client
105 */
106 struct radius_client {
107 struct radius_client *next;
108 struct in_addr addr;
109 struct in_addr mask;
110 #ifdef CONFIG_IPV6
111 struct in6_addr addr6;
112 struct in6_addr mask6;
113 #endif /* CONFIG_IPV6 */
114 char *shared_secret;
115 int shared_secret_len;
116 struct radius_session *sessions;
117 struct radius_server_counters counters;
118
119 u8 next_dac_identifier;
120 struct radius_msg *pending_dac_coa_req;
121 u8 pending_dac_coa_id;
122 u8 pending_dac_coa_addr[ETH_ALEN];
123 struct radius_msg *pending_dac_disconnect_req;
124 u8 pending_dac_disconnect_id;
125 u8 pending_dac_disconnect_addr[ETH_ALEN];
126 };
127
128 /**
129 * struct radius_server_data - Internal RADIUS server data
130 */
131 struct radius_server_data {
132 /**
133 * auth_sock - Socket for RADIUS authentication messages
134 */
135 int auth_sock;
136
137 /**
138 * acct_sock - Socket for RADIUS accounting messages
139 */
140 int acct_sock;
141
142 /**
143 * clients - List of authorized RADIUS clients
144 */
145 struct radius_client *clients;
146
147 /**
148 * next_sess_id - Next session identifier
149 */
150 unsigned int next_sess_id;
151
152 /**
153 * conf_ctx - Context pointer for callbacks
154 *
155 * This is used as the ctx argument in get_eap_user() calls.
156 */
157 void *conf_ctx;
158
159 /**
160 * num_sess - Number of active sessions
161 */
162 int num_sess;
163
164 /**
165 * eap_sim_db_priv - EAP-SIM/AKA database context
166 *
167 * This is passed to the EAP-SIM/AKA server implementation as a
168 * callback context.
169 */
170 void *eap_sim_db_priv;
171
172 /**
173 * ssl_ctx - TLS context
174 *
175 * This is passed to the EAP server implementation as a callback
176 * context for TLS operations.
177 */
178 void *ssl_ctx;
179
180 /**
181 * pac_opaque_encr_key - PAC-Opaque encryption key for EAP-FAST
182 *
183 * This parameter is used to set a key for EAP-FAST to encrypt the
184 * PAC-Opaque data. It can be set to %NULL if EAP-FAST is not used. If
185 * set, must point to a 16-octet key.
186 */
187 u8 *pac_opaque_encr_key;
188
189 /**
190 * eap_fast_a_id - EAP-FAST authority identity (A-ID)
191 *
192 * If EAP-FAST is not used, this can be set to %NULL. In theory, this
193 * is a variable length field, but due to some existing implementations
194 * requiring A-ID to be 16 octets in length, it is recommended to use
195 * that length for the field to provide interoperability with deployed
196 * peer implementations.
197 */
198 u8 *eap_fast_a_id;
199
200 /**
201 * eap_fast_a_id_len - Length of eap_fast_a_id buffer in octets
202 */
203 size_t eap_fast_a_id_len;
204
205 /**
206 * eap_fast_a_id_info - EAP-FAST authority identifier information
207 *
208 * This A-ID-Info contains a user-friendly name for the A-ID. For
209 * example, this could be the enterprise and server names in
210 * human-readable format. This field is encoded as UTF-8. If EAP-FAST
211 * is not used, this can be set to %NULL.
212 */
213 char *eap_fast_a_id_info;
214
215 /**
216 * eap_fast_prov - EAP-FAST provisioning modes
217 *
218 * 0 = provisioning disabled, 1 = only anonymous provisioning allowed,
219 * 2 = only authenticated provisioning allowed, 3 = both provisioning
220 * modes allowed.
221 */
222 int eap_fast_prov;
223
224 /**
225 * pac_key_lifetime - EAP-FAST PAC-Key lifetime in seconds
226 *
227 * This is the hard limit on how long a provisioned PAC-Key can be
228 * used.
229 */
230 int pac_key_lifetime;
231
232 /**
233 * pac_key_refresh_time - EAP-FAST PAC-Key refresh time in seconds
234 *
235 * This is a soft limit on the PAC-Key. The server will automatically
236 * generate a new PAC-Key when this number of seconds (or fewer) of the
237 * lifetime remains.
238 */
239 int pac_key_refresh_time;
240
241 int eap_teap_auth;
242 int eap_teap_pac_no_inner;
243
244 /**
245 * eap_sim_aka_result_ind - EAP-SIM/AKA protected success indication
246 *
247 * This controls whether the protected success/failure indication
248 * (AT_RESULT_IND) is used with EAP-SIM and EAP-AKA.
249 */
250 int eap_sim_aka_result_ind;
251
252 int eap_sim_id;
253
254 /**
255 * tnc - Trusted Network Connect (TNC)
256 *
257 * This controls whether TNC is enabled and will be required before the
258 * peer is allowed to connect. Note: This is only used with EAP-TTLS
259 * and EAP-FAST. If any other EAP method is enabled, the peer will be
260 * allowed to connect without TNC.
261 */
262 int tnc;
263
264 /**
265 * pwd_group - The D-H group assigned for EAP-pwd
266 *
267 * If EAP-pwd is not used it can be set to zero.
268 */
269 u16 pwd_group;
270
271 /**
272 * server_id - Server identity
273 */
274 const char *server_id;
275
276 /**
277 * erp - Whether EAP Re-authentication Protocol (ERP) is enabled
278 *
279 * This controls whether the authentication server derives ERP key
280 * hierarchy (rRK and rIK) from full EAP authentication and allows
281 * these keys to be used to perform ERP to derive rMSK instead of full
282 * EAP authentication to derive MSK.
283 */
284 int erp;
285
286 const char *erp_domain;
287
288 struct dl_list erp_keys; /* struct eap_server_erp_key */
289
290 unsigned int tls_session_lifetime;
291
292 unsigned int tls_flags;
293
294 /**
295 * wps - Wi-Fi Protected Setup context
296 *
297 * If WPS is used with an external RADIUS server (which is quite
298 * unlikely configuration), this is used to provide a pointer to WPS
299 * context data. Normally, this can be set to %NULL.
300 */
301 struct wps_context *wps;
302
303 /**
304 * ipv6 - Whether to enable IPv6 support in the RADIUS server
305 */
306 int ipv6;
307
308 /**
309 * start_time - Timestamp of server start
310 */
311 struct os_reltime start_time;
312
313 /**
314 * counters - Statistics counters for server operations
315 *
316 * These counters are the sum over all clients.
317 */
318 struct radius_server_counters counters;
319
320 /**
321 * get_eap_user - Callback for fetching EAP user information
322 * @ctx: Context data from conf_ctx
323 * @identity: User identity
324 * @identity_len: identity buffer length in octets
325 * @phase2: Whether this is for Phase 2 identity
326 * @user: Data structure for filling in the user information
327 * Returns: 0 on success, -1 on failure
328 *
329 * This is used to fetch information from user database. The callback
330 * will fill in information about allowed EAP methods and the user
331 * password. The password field will be an allocated copy of the
332 * password data and RADIUS server will free it after use.
333 */
334 int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
335 int phase2, struct eap_user *user);
336
337 /**
338 * eap_req_id_text - Optional data for EAP-Request/Identity
339 *
340 * This can be used to configure an optional, displayable message that
341 * will be sent in EAP-Request/Identity. This string can contain an
342 * ASCII-0 character (nul) to separate network infromation per RFC
343 * 4284. The actual string length is explicit provided in
344 * eap_req_id_text_len since nul character will not be used as a string
345 * terminator.
346 */
347 char *eap_req_id_text;
348
349 /**
350 * eap_req_id_text_len - Length of eap_req_id_text buffer in octets
351 */
352 size_t eap_req_id_text_len;
353
354 /*
355 * msg_ctx - Context data for wpa_msg() calls
356 */
357 void *msg_ctx;
358
359 #ifdef CONFIG_RADIUS_TEST
360 char *dump_msk_file;
361 #endif /* CONFIG_RADIUS_TEST */
362
363 char *subscr_remediation_url;
364 u8 subscr_remediation_method;
365 char *hs20_sim_provisioning_url;
366
367 char *t_c_server_url;
368
369 #ifdef CONFIG_SQLITE
370 sqlite3 *db;
371 #endif /* CONFIG_SQLITE */
372 };
373
374
375 #define RADIUS_DEBUG(args...) \
376 wpa_printf(MSG_DEBUG, "RADIUS SRV: " args)
377 #define RADIUS_ERROR(args...) \
378 wpa_printf(MSG_ERROR, "RADIUS SRV: " args)
379 #define RADIUS_DUMP(args...) \
380 wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args)
381 #define RADIUS_DUMP_ASCII(args...) \
382 wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args)
383
384
385 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx);
386 static void radius_server_session_remove_timeout(void *eloop_ctx,
387 void *timeout_ctx);
388
389 #ifdef CONFIG_SQLITE
390 #ifdef CONFIG_HS20
391
db_table_exists(sqlite3 * db,const char * name)392 static int db_table_exists(sqlite3 *db, const char *name)
393 {
394 char cmd[128];
395
396 os_snprintf(cmd, sizeof(cmd), "SELECT 1 FROM %s;", name);
397 return sqlite3_exec(db, cmd, NULL, NULL, NULL) == SQLITE_OK;
398 }
399
400
db_table_create_sim_provisioning(sqlite3 * db)401 static int db_table_create_sim_provisioning(sqlite3 *db)
402 {
403 char *err = NULL;
404 const char *sql =
405 "CREATE TABLE sim_provisioning("
406 " mobile_identifier_hash TEXT PRIMARY KEY,"
407 " imsi TEXT,"
408 " mac_addr TEXT,"
409 " eap_method TEXT,"
410 " timestamp TEXT"
411 ");";
412
413 RADIUS_DEBUG("Adding database table for SIM provisioning information");
414 if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) {
415 RADIUS_ERROR("SQLite error: %s", err);
416 sqlite3_free(err);
417 return -1;
418 }
419
420 return 0;
421 }
422
423 #endif /* CONFIG_HS20 */
424 #endif /* CONFIG_SQLITE */
425
426
427 void srv_log(struct radius_session *sess, const char *fmt, ...)
428 PRINTF_FORMAT(2, 3);
429
srv_log(struct radius_session * sess,const char * fmt,...)430 void srv_log(struct radius_session *sess, const char *fmt, ...)
431 {
432 va_list ap;
433 char *buf;
434 int buflen;
435
436 va_start(ap, fmt);
437 buflen = vsnprintf(NULL, 0, fmt, ap) + 1;
438 va_end(ap);
439
440 buf = os_malloc(buflen);
441 if (buf == NULL)
442 return;
443 va_start(ap, fmt);
444 vsnprintf(buf, buflen, fmt, ap);
445 va_end(ap);
446
447 RADIUS_DEBUG("[0x%x %s] %s", sess->sess_id, sess->nas_ip, buf);
448
449 #ifdef CONFIG_SQLITE
450 if (sess->server->db) {
451 char *sql;
452 sql = sqlite3_mprintf("INSERT INTO authlog"
453 "(timestamp,session,nas_ip,username,note)"
454 " VALUES ("
455 "strftime('%%Y-%%m-%%d %%H:%%M:%%f',"
456 "'now'),%u,%Q,%Q,%Q)",
457 sess->sess_id, sess->nas_ip,
458 sess->username, buf);
459 if (sql) {
460 if (sqlite3_exec(sess->server->db, sql, NULL, NULL,
461 NULL) != SQLITE_OK) {
462 RADIUS_ERROR("Failed to add authlog entry into sqlite database: %s",
463 sqlite3_errmsg(sess->server->db));
464 }
465 sqlite3_free(sql);
466 }
467 }
468 #endif /* CONFIG_SQLITE */
469
470 os_free(buf);
471 }
472
473
474 static struct radius_client *
radius_server_get_client(struct radius_server_data * data,struct in_addr * addr,int ipv6)475 radius_server_get_client(struct radius_server_data *data, struct in_addr *addr,
476 int ipv6)
477 {
478 struct radius_client *client = data->clients;
479
480 while (client) {
481 #ifdef CONFIG_IPV6
482 if (ipv6) {
483 struct in6_addr *addr6;
484 int i;
485
486 addr6 = (struct in6_addr *) addr;
487 for (i = 0; i < 16; i++) {
488 if ((addr6->s6_addr[i] &
489 client->mask6.s6_addr[i]) !=
490 (client->addr6.s6_addr[i] &
491 client->mask6.s6_addr[i])) {
492 i = 17;
493 break;
494 }
495 }
496 if (i == 16) {
497 break;
498 }
499 }
500 #endif /* CONFIG_IPV6 */
501 if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) ==
502 (addr->s_addr & client->mask.s_addr)) {
503 break;
504 }
505
506 client = client->next;
507 }
508
509 return client;
510 }
511
512
513 static struct radius_session *
radius_server_get_session(struct radius_client * client,unsigned int sess_id)514 radius_server_get_session(struct radius_client *client, unsigned int sess_id)
515 {
516 struct radius_session *sess = client->sessions;
517
518 while (sess) {
519 if (sess->sess_id == sess_id) {
520 break;
521 }
522 sess = sess->next;
523 }
524
525 return sess;
526 }
527
528
radius_server_session_free(struct radius_server_data * data,struct radius_session * sess)529 static void radius_server_session_free(struct radius_server_data *data,
530 struct radius_session *sess)
531 {
532 eloop_cancel_timeout(radius_server_session_timeout, data, sess);
533 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
534 eap_server_sm_deinit(sess->eap);
535 radius_msg_free(sess->last_msg);
536 os_free(sess->last_from_addr);
537 radius_msg_free(sess->last_reply);
538 os_free(sess->username);
539 os_free(sess->nas_ip);
540 os_free(sess);
541 data->num_sess--;
542 }
543
544
radius_server_session_remove(struct radius_server_data * data,struct radius_session * sess)545 static void radius_server_session_remove(struct radius_server_data *data,
546 struct radius_session *sess)
547 {
548 struct radius_client *client = sess->client;
549 struct radius_session *session, *prev;
550
551 eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
552
553 prev = NULL;
554 session = client->sessions;
555 while (session) {
556 if (session == sess) {
557 if (prev == NULL) {
558 client->sessions = sess->next;
559 } else {
560 prev->next = sess->next;
561 }
562 radius_server_session_free(data, sess);
563 break;
564 }
565 prev = session;
566 session = session->next;
567 }
568 }
569
570
radius_server_session_remove_timeout(void * eloop_ctx,void * timeout_ctx)571 static void radius_server_session_remove_timeout(void *eloop_ctx,
572 void *timeout_ctx)
573 {
574 struct radius_server_data *data = eloop_ctx;
575 struct radius_session *sess = timeout_ctx;
576 RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
577 radius_server_session_remove(data, sess);
578 }
579
580
radius_server_session_timeout(void * eloop_ctx,void * timeout_ctx)581 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx)
582 {
583 struct radius_server_data *data = eloop_ctx;
584 struct radius_session *sess = timeout_ctx;
585
586 RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id);
587 radius_server_session_remove(data, sess);
588 }
589
590
591 static struct radius_session *
radius_server_new_session(struct radius_server_data * data,struct radius_client * client)592 radius_server_new_session(struct radius_server_data *data,
593 struct radius_client *client)
594 {
595 struct radius_session *sess;
596
597 if (data->num_sess >= RADIUS_MAX_SESSION) {
598 RADIUS_DEBUG("Maximum number of existing session - no room "
599 "for a new session");
600 return NULL;
601 }
602
603 sess = os_zalloc(sizeof(*sess));
604 if (sess == NULL)
605 return NULL;
606
607 sess->server = data;
608 sess->client = client;
609 sess->sess_id = data->next_sess_id++;
610 sess->next = client->sessions;
611 client->sessions = sess;
612 eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0,
613 radius_server_session_timeout, data, sess);
614 data->num_sess++;
615 return sess;
616 }
617
618
619 #ifdef CONFIG_TESTING_OPTIONS
radius_server_testing_options_tls(struct radius_session * sess,const char * tls,struct eap_config * eap_conf)620 static void radius_server_testing_options_tls(struct radius_session *sess,
621 const char *tls,
622 struct eap_config *eap_conf)
623 {
624 int test = atoi(tls);
625
626 switch (test) {
627 case 1:
628 srv_log(sess, "TLS test - break VerifyData");
629 eap_conf->tls_test_flags = TLS_BREAK_VERIFY_DATA;
630 break;
631 case 2:
632 srv_log(sess, "TLS test - break ServerKeyExchange ServerParams hash");
633 eap_conf->tls_test_flags = TLS_BREAK_SRV_KEY_X_HASH;
634 break;
635 case 3:
636 srv_log(sess, "TLS test - break ServerKeyExchange ServerParams Signature");
637 eap_conf->tls_test_flags = TLS_BREAK_SRV_KEY_X_SIGNATURE;
638 break;
639 case 4:
640 srv_log(sess, "TLS test - RSA-DHE using a short 511-bit prime");
641 eap_conf->tls_test_flags = TLS_DHE_PRIME_511B;
642 break;
643 case 5:
644 srv_log(sess, "TLS test - RSA-DHE using a short 767-bit prime");
645 eap_conf->tls_test_flags = TLS_DHE_PRIME_767B;
646 break;
647 case 6:
648 srv_log(sess, "TLS test - RSA-DHE using a bogus 15 \"prime\"");
649 eap_conf->tls_test_flags = TLS_DHE_PRIME_15;
650 break;
651 case 7:
652 srv_log(sess, "TLS test - RSA-DHE using a short 58-bit prime in long container");
653 eap_conf->tls_test_flags = TLS_DHE_PRIME_58B;
654 break;
655 case 8:
656 srv_log(sess, "TLS test - RSA-DHE using a non-prime");
657 eap_conf->tls_test_flags = TLS_DHE_NON_PRIME;
658 break;
659 default:
660 srv_log(sess, "Unrecognized TLS test");
661 break;
662 }
663 }
664 #endif /* CONFIG_TESTING_OPTIONS */
665
radius_server_testing_options(struct radius_session * sess,struct eap_config * eap_conf)666 static void radius_server_testing_options(struct radius_session *sess,
667 struct eap_config *eap_conf)
668 {
669 #ifdef CONFIG_TESTING_OPTIONS
670 const char *pos;
671
672 pos = os_strstr(sess->username, "@test-");
673 if (pos == NULL)
674 return;
675 pos += 6;
676 if (os_strncmp(pos, "tls-", 4) == 0)
677 radius_server_testing_options_tls(sess, pos + 4, eap_conf);
678 else
679 srv_log(sess, "Unrecognized test: %s", pos);
680 #endif /* CONFIG_TESTING_OPTIONS */
681 }
682
683
684 #ifdef CONFIG_ERP
685 static struct eap_server_erp_key *
radius_server_erp_find_key(struct radius_server_data * data,const char * keyname)686 radius_server_erp_find_key(struct radius_server_data *data, const char *keyname)
687 {
688 struct eap_server_erp_key *erp;
689
690 dl_list_for_each(erp, &data->erp_keys, struct eap_server_erp_key,
691 list) {
692 if (os_strcmp(erp->keyname_nai, keyname) == 0)
693 return erp;
694 }
695
696 return NULL;
697 }
698 #endif /* CONFIG_ERP */
699
700
701 static struct radius_session *
radius_server_get_new_session(struct radius_server_data * data,struct radius_client * client,struct radius_msg * msg,const char * from_addr)702 radius_server_get_new_session(struct radius_server_data *data,
703 struct radius_client *client,
704 struct radius_msg *msg, const char *from_addr)
705 {
706 u8 *user, *id;
707 size_t user_len, id_len;
708 int res;
709 struct radius_session *sess;
710 struct eap_config eap_conf;
711 struct eap_user *tmp;
712
713 RADIUS_DEBUG("Creating a new session");
714
715 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &user,
716 &user_len, NULL) < 0) {
717 RADIUS_DEBUG("Could not get User-Name");
718 return NULL;
719 }
720 RADIUS_DUMP_ASCII("User-Name", user, user_len);
721
722 tmp = os_zalloc(sizeof(*tmp));
723 if (!tmp)
724 return NULL;
725
726 res = data->get_eap_user(data->conf_ctx, user, user_len, 0, tmp);
727 #ifdef CONFIG_ERP
728 if (res != 0 && data->erp) {
729 char *username;
730
731 username = os_zalloc(user_len + 1);
732 if (username) {
733 os_memcpy(username, user, user_len);
734 if (radius_server_erp_find_key(data, username))
735 res = 0;
736 os_free(username);
737 }
738 }
739 #endif /* CONFIG_ERP */
740 if (res != 0) {
741 RADIUS_DEBUG("User-Name not found from user database");
742 eap_user_free(tmp);
743 return NULL;
744 }
745
746 RADIUS_DEBUG("Matching user entry found");
747 sess = radius_server_new_session(data, client);
748 if (sess == NULL) {
749 RADIUS_DEBUG("Failed to create a new session");
750 eap_user_free(tmp);
751 return NULL;
752 }
753 sess->accept_attr = tmp->accept_attr;
754 sess->macacl = tmp->macacl;
755 eap_user_free(tmp);
756
757 sess->username = os_malloc(user_len * 4 + 1);
758 if (sess->username == NULL) {
759 radius_server_session_remove(data, sess);
760 return NULL;
761 }
762 printf_encode(sess->username, user_len * 4 + 1, user, user_len);
763
764 sess->nas_ip = os_strdup(from_addr);
765 if (sess->nas_ip == NULL) {
766 radius_server_session_remove(data, sess);
767 return NULL;
768 }
769
770 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CALLING_STATION_ID, &id,
771 &id_len, NULL) == 0) {
772 char buf[3 * ETH_ALEN];
773
774 os_memset(buf, 0, sizeof(buf));
775 if (id_len >= sizeof(buf))
776 id_len = sizeof(buf) - 1;
777 os_memcpy(buf, id, id_len);
778 if (hwaddr_aton2(buf, sess->mac_addr) < 0)
779 os_memset(sess->mac_addr, 0, ETH_ALEN);
780 else
781 RADIUS_DEBUG("Calling-Station-Id: " MACSTR,
782 MAC2STR(sess->mac_addr));
783 }
784
785 srv_log(sess, "New session created");
786
787 os_memset(&eap_conf, 0, sizeof(eap_conf));
788 eap_conf.ssl_ctx = data->ssl_ctx;
789 eap_conf.msg_ctx = data->msg_ctx;
790 eap_conf.eap_sim_db_priv = data->eap_sim_db_priv;
791 eap_conf.backend_auth = TRUE;
792 eap_conf.eap_server = 1;
793 eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key;
794 eap_conf.eap_fast_a_id = data->eap_fast_a_id;
795 eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len;
796 eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info;
797 eap_conf.eap_fast_prov = data->eap_fast_prov;
798 eap_conf.pac_key_lifetime = data->pac_key_lifetime;
799 eap_conf.pac_key_refresh_time = data->pac_key_refresh_time;
800 eap_conf.eap_teap_auth = data->eap_teap_auth;
801 eap_conf.eap_teap_pac_no_inner = data->eap_teap_pac_no_inner;
802 eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
803 eap_conf.eap_sim_id = data->eap_sim_id;
804 eap_conf.tnc = data->tnc;
805 eap_conf.wps = data->wps;
806 eap_conf.pwd_group = data->pwd_group;
807 eap_conf.server_id = (const u8 *) data->server_id;
808 eap_conf.server_id_len = os_strlen(data->server_id);
809 eap_conf.erp = data->erp;
810 eap_conf.tls_session_lifetime = data->tls_session_lifetime;
811 eap_conf.tls_flags = data->tls_flags;
812 radius_server_testing_options(sess, &eap_conf);
813 sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb,
814 &eap_conf);
815 if (sess->eap == NULL) {
816 RADIUS_DEBUG("Failed to initialize EAP state machine for the "
817 "new session");
818 radius_server_session_remove(data, sess);
819 return NULL;
820 }
821 sess->eap_if = eap_get_interface(sess->eap);
822 sess->eap_if->eapRestart = TRUE;
823 sess->eap_if->portEnabled = TRUE;
824
825 RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);
826
827 return sess;
828 }
829
830
831 #ifdef CONFIG_HS20
radius_srv_hs20_t_c_pending(struct radius_session * sess)832 static void radius_srv_hs20_t_c_pending(struct radius_session *sess)
833 {
834 #ifdef CONFIG_SQLITE
835 char *sql;
836 char addr[3 * ETH_ALEN], *id_str;
837 const u8 *id;
838 size_t id_len;
839
840 if (!sess->server->db || !sess->eap ||
841 is_zero_ether_addr(sess->mac_addr))
842 return;
843
844 os_snprintf(addr, sizeof(addr), MACSTR, MAC2STR(sess->mac_addr));
845
846 id = eap_get_identity(sess->eap, &id_len);
847 if (!id)
848 return;
849 id_str = os_malloc(id_len + 1);
850 if (!id_str)
851 return;
852 os_memcpy(id_str, id, id_len);
853 id_str[id_len] = '\0';
854
855 sql = sqlite3_mprintf("INSERT OR REPLACE INTO pending_tc (mac_addr,identity) VALUES (%Q,%Q)",
856 addr, id_str);
857 os_free(id_str);
858 if (!sql)
859 return;
860
861 if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) !=
862 SQLITE_OK) {
863 RADIUS_ERROR("Failed to add pending_tc entry into sqlite database: %s",
864 sqlite3_errmsg(sess->server->db));
865 }
866 sqlite3_free(sql);
867 #endif /* CONFIG_SQLITE */
868 }
869 #endif /* CONFIG_HS20 */
870
871
radius_server_add_session(struct radius_session * sess)872 static void radius_server_add_session(struct radius_session *sess)
873 {
874 #ifdef CONFIG_SQLITE
875 char *sql;
876 char addr_txt[ETH_ALEN * 3];
877 struct os_time now;
878
879 if (!sess->server->db)
880 return;
881
882
883 os_snprintf(addr_txt, sizeof(addr_txt), MACSTR,
884 MAC2STR(sess->mac_addr));
885
886 os_get_time(&now);
887 sql = sqlite3_mprintf("INSERT OR REPLACE INTO current_sessions(mac_addr,identity,start_time,nas,hs20_t_c_filtering) VALUES (%Q,%Q,%d,%Q,%u)",
888 addr_txt, sess->username, now.sec,
889 sess->nas_ip, sess->t_c_filtering);
890 if (sql) {
891 if (sqlite3_exec(sess->server->db, sql, NULL, NULL,
892 NULL) != SQLITE_OK) {
893 RADIUS_ERROR("Failed to add current_sessions entry into sqlite database: %s",
894 sqlite3_errmsg(sess->server->db));
895 }
896 sqlite3_free(sql);
897 }
898 #endif /* CONFIG_SQLITE */
899 }
900
901
db_update_last_msk(struct radius_session * sess,const char * msk)902 static void db_update_last_msk(struct radius_session *sess, const char *msk)
903 {
904 #ifdef CONFIG_RADIUS_TEST
905 #ifdef CONFIG_SQLITE
906 char *sql = NULL;
907 char *id_str = NULL;
908 const u8 *id;
909 size_t id_len;
910 const char *serial_num;
911
912 if (!sess->server->db)
913 return;
914
915 serial_num = eap_get_serial_num(sess->eap);
916 if (serial_num) {
917 id_len = 5 + os_strlen(serial_num) + 1;
918 id_str = os_malloc(id_len);
919 if (!id_str)
920 return;
921 os_snprintf(id_str, id_len, "cert-%s", serial_num);
922 } else {
923 id = eap_get_identity(sess->eap, &id_len);
924 if (!id)
925 return;
926 id_str = os_malloc(id_len + 1);
927 if (!id_str)
928 return;
929 os_memcpy(id_str, id, id_len);
930 id_str[id_len] = '\0';
931 }
932
933 sql = sqlite3_mprintf("UPDATE users SET last_msk=%Q WHERE identity=%Q",
934 msk, id_str);
935 os_free(id_str);
936 if (!sql)
937 return;
938
939 if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) !=
940 SQLITE_OK) {
941 RADIUS_DEBUG("Failed to update last_msk: %s",
942 sqlite3_errmsg(sess->server->db));
943 }
944 sqlite3_free(sql);
945 #endif /* CONFIG_SQLITE */
946 #endif /* CONFIG_RADIUS_TEST */
947 }
948
949
950 #ifdef CONFIG_HS20
951
radius_server_is_sim_method(struct radius_session * sess)952 static int radius_server_is_sim_method(struct radius_session *sess)
953 {
954 const char *name;
955
956 name = eap_get_method(sess->eap);
957 return name &&
958 (os_strcmp(name, "SIM") == 0 ||
959 os_strcmp(name, "AKA") == 0 ||
960 os_strcmp(name, "AKA'") == 0);
961 }
962
963
radius_server_hs20_missing_sim_pps(struct radius_msg * request)964 static int radius_server_hs20_missing_sim_pps(struct radius_msg *request)
965 {
966 u8 *buf, *pos, *end, type, sublen;
967 size_t len;
968
969 buf = NULL;
970 for (;;) {
971 if (radius_msg_get_attr_ptr(request,
972 RADIUS_ATTR_VENDOR_SPECIFIC,
973 &buf, &len, buf) < 0)
974 return 0;
975 if (len < 6)
976 continue;
977 pos = buf;
978 end = buf + len;
979 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
980 continue;
981 pos += 4;
982
983 type = *pos++;
984 sublen = *pos++;
985 if (sublen < 2)
986 continue; /* invalid length */
987 sublen -= 2; /* skip header */
988 if (pos + sublen > end)
989 continue; /* invalid WFA VSA */
990
991 if (type != RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION)
992 continue;
993
994 RADIUS_DUMP("HS2.0 mobile device version", pos, sublen);
995 if (sublen < 1 + 2)
996 continue;
997 if (pos[0] == 0)
998 continue; /* Release 1 STA does not support provisioning
999
1000 */
1001 /* UpdateIdentifier 0 indicates no PPS MO */
1002 return WPA_GET_BE16(pos + 1) == 0;
1003 }
1004 }
1005
1006
1007 #define HS20_MOBILE_ID_HASH_LEN 16
1008
radius_server_sim_provisioning_session(struct radius_session * sess,const u8 * hash)1009 static int radius_server_sim_provisioning_session(struct radius_session *sess,
1010 const u8 *hash)
1011 {
1012 #ifdef CONFIG_SQLITE
1013 char *sql;
1014 char addr_txt[ETH_ALEN * 3];
1015 char hash_txt[2 * HS20_MOBILE_ID_HASH_LEN + 1];
1016 struct os_time now;
1017 int res;
1018 const char *imsi, *eap_method;
1019
1020 if (!sess->server->db ||
1021 (!db_table_exists(sess->server->db, "sim_provisioning") &&
1022 db_table_create_sim_provisioning(sess->server->db) < 0))
1023 return -1;
1024
1025 imsi = eap_get_imsi(sess->eap);
1026 if (!imsi)
1027 return -1;
1028
1029 eap_method = eap_get_method(sess->eap);
1030 if (!eap_method)
1031 return -1;
1032
1033 os_snprintf(addr_txt, sizeof(addr_txt), MACSTR,
1034 MAC2STR(sess->mac_addr));
1035 wpa_snprintf_hex(hash_txt, sizeof(hash_txt), hash,
1036 HS20_MOBILE_ID_HASH_LEN);
1037
1038 os_get_time(&now);
1039 sql = sqlite3_mprintf("INSERT INTO sim_provisioning(mobile_identifier_hash,imsi,mac_addr,eap_method,timestamp) VALUES (%Q,%Q,%Q,%Q,%u)",
1040 hash_txt, imsi, addr_txt, eap_method, now.sec);
1041 if (!sql)
1042 return -1;
1043
1044 if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) !=
1045 SQLITE_OK) {
1046 RADIUS_ERROR("Failed to add SIM provisioning entry into sqlite database: %s",
1047 sqlite3_errmsg(sess->server->db));
1048 res = -1;
1049 } else {
1050 res = 0;
1051 }
1052 sqlite3_free(sql);
1053 return res;
1054 #endif /* CONFIG_SQLITE */
1055 return -1;
1056 }
1057
1058 #endif /* CONFIG_HS20 */
1059
1060
1061 static struct radius_msg *
radius_server_encapsulate_eap(struct radius_server_data * data,struct radius_client * client,struct radius_session * sess,struct radius_msg * request)1062 radius_server_encapsulate_eap(struct radius_server_data *data,
1063 struct radius_client *client,
1064 struct radius_session *sess,
1065 struct radius_msg *request)
1066 {
1067 struct radius_msg *msg;
1068 int code;
1069 unsigned int sess_id;
1070 struct radius_hdr *hdr = radius_msg_get_hdr(request);
1071 u16 reason = WLAN_REASON_IEEE_802_1X_AUTH_FAILED;
1072
1073 if (sess->eap_if->eapFail) {
1074 sess->eap_if->eapFail = FALSE;
1075 code = RADIUS_CODE_ACCESS_REJECT;
1076 } else if (sess->eap_if->eapSuccess) {
1077 sess->eap_if->eapSuccess = FALSE;
1078 code = RADIUS_CODE_ACCESS_ACCEPT;
1079 } else {
1080 sess->eap_if->eapReq = FALSE;
1081 code = RADIUS_CODE_ACCESS_CHALLENGE;
1082 }
1083
1084 msg = radius_msg_new(code, hdr->identifier);
1085 if (msg == NULL) {
1086 RADIUS_DEBUG("Failed to allocate reply message");
1087 return NULL;
1088 }
1089
1090 sess_id = htonl(sess->sess_id);
1091 if (code == RADIUS_CODE_ACCESS_CHALLENGE &&
1092 !radius_msg_add_attr(msg, RADIUS_ATTR_STATE,
1093 (u8 *) &sess_id, sizeof(sess_id))) {
1094 RADIUS_DEBUG("Failed to add State attribute");
1095 }
1096
1097 if (sess->eap_if->eapReqData &&
1098 !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
1099 wpabuf_len(sess->eap_if->eapReqData))) {
1100 RADIUS_DEBUG("Failed to add EAP-Message attribute");
1101 }
1102
1103 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
1104 int len;
1105 #ifdef CONFIG_RADIUS_TEST
1106 char buf[2 * 64 + 1];
1107
1108 len = sess->eap_if->eapKeyDataLen;
1109 if (len > 64)
1110 len = 64;
1111 len = wpa_snprintf_hex(buf, sizeof(buf),
1112 sess->eap_if->eapKeyData, len);
1113 buf[len] = '\0';
1114
1115 if (data->dump_msk_file) {
1116 FILE *f;
1117
1118 f = fopen(data->dump_msk_file, "a");
1119 if (f) {
1120 len = sess->eap_if->eapKeyDataLen;
1121 if (len > 64)
1122 len = 64;
1123 len = wpa_snprintf_hex(
1124 buf, sizeof(buf),
1125 sess->eap_if->eapKeyData, len);
1126 buf[len] = '\0';
1127 fprintf(f, "%s\n", buf);
1128 fclose(f);
1129 }
1130 }
1131
1132 db_update_last_msk(sess, buf);
1133 #endif /* CONFIG_RADIUS_TEST */
1134 if (sess->eap_if->eapKeyDataLen > 64) {
1135 len = 32;
1136 } else {
1137 len = sess->eap_if->eapKeyDataLen / 2;
1138 }
1139 if (!radius_msg_add_mppe_keys(msg, hdr->authenticator,
1140 (u8 *) client->shared_secret,
1141 client->shared_secret_len,
1142 sess->eap_if->eapKeyData + len,
1143 len, sess->eap_if->eapKeyData,
1144 len)) {
1145 RADIUS_DEBUG("Failed to add MPPE key attributes");
1146 }
1147
1148 if (sess->eap_if->eapSessionId &&
1149 !radius_msg_add_attr(msg, RADIUS_ATTR_EAP_KEY_NAME,
1150 sess->eap_if->eapSessionId,
1151 sess->eap_if->eapSessionIdLen)) {
1152 RADIUS_DEBUG("Failed to add EAP-Key-Name attribute");
1153 }
1154 }
1155
1156 #ifdef CONFIG_HS20
1157 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->remediation &&
1158 data->subscr_remediation_url) {
1159 u8 *buf;
1160 size_t url_len = os_strlen(data->subscr_remediation_url);
1161 buf = os_malloc(1 + url_len);
1162 if (buf == NULL) {
1163 radius_msg_free(msg);
1164 return NULL;
1165 }
1166 buf[0] = data->subscr_remediation_method;
1167 os_memcpy(&buf[1], data->subscr_remediation_url, url_len);
1168 if (!radius_msg_add_wfa(
1169 msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION,
1170 buf, 1 + url_len)) {
1171 RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem");
1172 }
1173 os_free(buf);
1174 } else if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->remediation) {
1175 u8 buf[1];
1176 if (!radius_msg_add_wfa(
1177 msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION,
1178 buf, 0)) {
1179 RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem");
1180 }
1181 } else if (code == RADIUS_CODE_ACCESS_ACCEPT &&
1182 data->hs20_sim_provisioning_url &&
1183 radius_server_is_sim_method(sess) &&
1184 radius_server_hs20_missing_sim_pps(request)) {
1185 u8 *buf, *pos, hash[HS20_MOBILE_ID_HASH_LEN];
1186 size_t prefix_len, url_len;
1187
1188 RADIUS_DEBUG("Device needs HS 2.0 SIM provisioning");
1189
1190 if (os_get_random(hash, HS20_MOBILE_ID_HASH_LEN) < 0) {
1191 radius_msg_free(msg);
1192 return NULL;
1193 }
1194 RADIUS_DUMP("hotspot2dot0-mobile-identifier-hash",
1195 hash, HS20_MOBILE_ID_HASH_LEN);
1196
1197 if (radius_server_sim_provisioning_session(sess, hash) < 0) {
1198 radius_msg_free(msg);
1199 return NULL;
1200 }
1201
1202 prefix_len = os_strlen(data->hs20_sim_provisioning_url);
1203 url_len = prefix_len + 2 * HS20_MOBILE_ID_HASH_LEN;
1204 buf = os_malloc(1 + url_len + 1);
1205 if (!buf) {
1206 radius_msg_free(msg);
1207 return NULL;
1208 }
1209 pos = buf;
1210 *pos++ = data->subscr_remediation_method;
1211 os_memcpy(pos, data->hs20_sim_provisioning_url, prefix_len);
1212 pos += prefix_len;
1213 wpa_snprintf_hex((char *) pos, 2 * HS20_MOBILE_ID_HASH_LEN + 1,
1214 hash, HS20_MOBILE_ID_HASH_LEN);
1215 RADIUS_DEBUG("HS 2.0 subscription remediation URL: %s",
1216 (char *) &buf[1]);
1217 if (!radius_msg_add_wfa(
1218 msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION,
1219 buf, 1 + url_len)) {
1220 RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem");
1221 }
1222 os_free(buf);
1223 }
1224
1225 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->t_c_filtering) {
1226 u8 buf[4] = { 0x01, 0x00, 0x00, 0x00 }; /* E=1 */
1227 const char *url = data->t_c_server_url, *pos;
1228 char *url2, *end2, *pos2;
1229 size_t url_len;
1230
1231 if (!radius_msg_add_wfa(
1232 msg, RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING,
1233 buf, sizeof(buf))) {
1234 RADIUS_DEBUG("Failed to add WFA-HS20-T-C-Filtering");
1235 radius_msg_free(msg);
1236 return NULL;
1237 }
1238
1239 if (!url) {
1240 RADIUS_DEBUG("No t_c_server_url configured");
1241 radius_msg_free(msg);
1242 return NULL;
1243 }
1244
1245 pos = os_strstr(url, "@1@");
1246 if (!pos) {
1247 RADIUS_DEBUG("No @1@ macro in t_c_server_url");
1248 radius_msg_free(msg);
1249 return NULL;
1250 }
1251
1252 url_len = os_strlen(url) + ETH_ALEN * 3 - 1 - 3;
1253 url2 = os_malloc(url_len + 1);
1254 if (!url2) {
1255 RADIUS_DEBUG("Failed to allocate room for T&C Server URL");
1256 os_free(url2);
1257 radius_msg_free(msg);
1258 return NULL;
1259 }
1260 pos2 = url2;
1261 end2 = url2 + url_len + 1;
1262 os_memcpy(pos2, url, pos - url);
1263 pos2 += pos - url;
1264 os_snprintf(pos2, end2 - pos2, MACSTR, MAC2STR(sess->mac_addr));
1265 pos2 += ETH_ALEN * 3 - 1;
1266 os_memcpy(pos2, pos + 3, os_strlen(pos + 3));
1267 if (!radius_msg_add_wfa(msg,
1268 RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL,
1269 (const u8 *) url2, url_len)) {
1270 RADIUS_DEBUG("Failed to add WFA-HS20-T-C-URL");
1271 os_free(url2);
1272 radius_msg_free(msg);
1273 return NULL;
1274 }
1275 os_free(url2);
1276
1277 radius_srv_hs20_t_c_pending(sess);
1278 }
1279 #endif /* CONFIG_HS20 */
1280
1281 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
1282 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
1283 radius_msg_free(msg);
1284 return NULL;
1285 }
1286
1287 if (code == RADIUS_CODE_ACCESS_ACCEPT) {
1288 struct hostapd_radius_attr *attr;
1289 for (attr = sess->accept_attr; attr; attr = attr->next) {
1290 if (!radius_msg_add_attr(msg, attr->type,
1291 wpabuf_head(attr->val),
1292 wpabuf_len(attr->val))) {
1293 wpa_printf(MSG_ERROR, "Could not add RADIUS attribute");
1294 radius_msg_free(msg);
1295 return NULL;
1296 }
1297 }
1298 }
1299
1300 if (code == RADIUS_CODE_ACCESS_REJECT) {
1301 if (radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_REASON_CODE,
1302 reason) < 0) {
1303 RADIUS_DEBUG("Failed to add WLAN-Reason-Code attribute");
1304 radius_msg_free(msg);
1305 return NULL;
1306 }
1307 }
1308
1309 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
1310 client->shared_secret_len,
1311 hdr->authenticator) < 0) {
1312 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
1313 }
1314
1315 if (code == RADIUS_CODE_ACCESS_ACCEPT)
1316 radius_server_add_session(sess);
1317
1318 return msg;
1319 }
1320
1321
1322 static struct radius_msg *
radius_server_macacl(struct radius_server_data * data,struct radius_client * client,struct radius_session * sess,struct radius_msg * request)1323 radius_server_macacl(struct radius_server_data *data,
1324 struct radius_client *client,
1325 struct radius_session *sess,
1326 struct radius_msg *request)
1327 {
1328 struct radius_msg *msg;
1329 int code;
1330 struct radius_hdr *hdr = radius_msg_get_hdr(request);
1331 u8 *pw;
1332 size_t pw_len;
1333
1334 code = RADIUS_CODE_ACCESS_ACCEPT;
1335
1336 if (radius_msg_get_attr_ptr(request, RADIUS_ATTR_USER_PASSWORD, &pw,
1337 &pw_len, NULL) < 0) {
1338 RADIUS_DEBUG("Could not get User-Password");
1339 code = RADIUS_CODE_ACCESS_REJECT;
1340 } else {
1341 int res;
1342 struct eap_user tmp;
1343
1344 os_memset(&tmp, 0, sizeof(tmp));
1345 res = data->get_eap_user(data->conf_ctx, (u8 *) sess->username,
1346 os_strlen(sess->username), 0, &tmp);
1347 if (res || !tmp.macacl || tmp.password == NULL) {
1348 RADIUS_DEBUG("No MAC ACL user entry");
1349 bin_clear_free(tmp.password, tmp.password_len);
1350 code = RADIUS_CODE_ACCESS_REJECT;
1351 } else {
1352 u8 buf[128];
1353 res = radius_user_password_hide(
1354 request, tmp.password, tmp.password_len,
1355 (u8 *) client->shared_secret,
1356 client->shared_secret_len,
1357 buf, sizeof(buf));
1358 bin_clear_free(tmp.password, tmp.password_len);
1359
1360 if (res < 0 || pw_len != (size_t) res ||
1361 os_memcmp_const(pw, buf, res) != 0) {
1362 RADIUS_DEBUG("Incorrect User-Password");
1363 code = RADIUS_CODE_ACCESS_REJECT;
1364 }
1365 }
1366 }
1367
1368 msg = radius_msg_new(code, hdr->identifier);
1369 if (msg == NULL) {
1370 RADIUS_DEBUG("Failed to allocate reply message");
1371 return NULL;
1372 }
1373
1374 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
1375 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
1376 radius_msg_free(msg);
1377 return NULL;
1378 }
1379
1380 if (code == RADIUS_CODE_ACCESS_ACCEPT) {
1381 struct hostapd_radius_attr *attr;
1382 for (attr = sess->accept_attr; attr; attr = attr->next) {
1383 if (!radius_msg_add_attr(msg, attr->type,
1384 wpabuf_head(attr->val),
1385 wpabuf_len(attr->val))) {
1386 wpa_printf(MSG_ERROR, "Could not add RADIUS attribute");
1387 radius_msg_free(msg);
1388 return NULL;
1389 }
1390 }
1391 }
1392
1393 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
1394 client->shared_secret_len,
1395 hdr->authenticator) < 0) {
1396 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
1397 }
1398
1399 return msg;
1400 }
1401
1402
radius_server_reject(struct radius_server_data * data,struct radius_client * client,struct radius_msg * request,struct sockaddr * from,socklen_t fromlen,const char * from_addr,int from_port)1403 static int radius_server_reject(struct radius_server_data *data,
1404 struct radius_client *client,
1405 struct radius_msg *request,
1406 struct sockaddr *from, socklen_t fromlen,
1407 const char *from_addr, int from_port)
1408 {
1409 struct radius_msg *msg;
1410 int ret = 0;
1411 struct eap_hdr eapfail;
1412 struct wpabuf *buf;
1413 struct radius_hdr *hdr = radius_msg_get_hdr(request);
1414
1415 RADIUS_DEBUG("Reject invalid request from %s:%d",
1416 from_addr, from_port);
1417
1418 msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier);
1419 if (msg == NULL) {
1420 return -1;
1421 }
1422
1423 os_memset(&eapfail, 0, sizeof(eapfail));
1424 eapfail.code = EAP_CODE_FAILURE;
1425 eapfail.identifier = 0;
1426 eapfail.length = host_to_be16(sizeof(eapfail));
1427
1428 if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) {
1429 RADIUS_DEBUG("Failed to add EAP-Message attribute");
1430 }
1431
1432 if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
1433 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
1434 radius_msg_free(msg);
1435 return -1;
1436 }
1437
1438 if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
1439 client->shared_secret_len,
1440 hdr->authenticator) <
1441 0) {
1442 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
1443 }
1444
1445 if (wpa_debug_level <= MSG_MSGDUMP) {
1446 radius_msg_dump(msg);
1447 }
1448
1449 data->counters.access_rejects++;
1450 client->counters.access_rejects++;
1451 buf = radius_msg_get_buf(msg);
1452 if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0,
1453 (struct sockaddr *) from, sizeof(*from)) < 0) {
1454 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", strerror(errno));
1455 ret = -1;
1456 }
1457
1458 radius_msg_free(msg);
1459
1460 return ret;
1461 }
1462
1463
radius_server_hs20_t_c_check(struct radius_session * sess,struct radius_msg * msg)1464 static void radius_server_hs20_t_c_check(struct radius_session *sess,
1465 struct radius_msg *msg)
1466 {
1467 #ifdef CONFIG_HS20
1468 u8 *buf, *pos, *end, type, sublen, *timestamp = NULL;
1469 size_t len;
1470
1471 buf = NULL;
1472 for (;;) {
1473 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC,
1474 &buf, &len, buf) < 0)
1475 break;
1476 if (len < 6)
1477 continue;
1478 pos = buf;
1479 end = buf + len;
1480 if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA)
1481 continue;
1482 pos += 4;
1483
1484 type = *pos++;
1485 sublen = *pos++;
1486 if (sublen < 2)
1487 continue; /* invalid length */
1488 sublen -= 2; /* skip header */
1489 if (pos + sublen > end)
1490 continue; /* invalid WFA VSA */
1491
1492 if (type == RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP && len >= 4) {
1493 timestamp = pos;
1494 break;
1495 }
1496 }
1497
1498 if (!timestamp)
1499 return;
1500 RADIUS_DEBUG("HS20-Timestamp: %u", WPA_GET_BE32(timestamp));
1501 if (sess->t_c_timestamp != WPA_GET_BE32(timestamp)) {
1502 RADIUS_DEBUG("Last read T&C timestamp does not match HS20-Timestamp --> require filtering");
1503 sess->t_c_filtering = 1;
1504 }
1505 #endif /* CONFIG_HS20 */
1506 }
1507
1508
radius_server_request(struct radius_server_data * data,struct radius_msg * msg,struct sockaddr * from,socklen_t fromlen,struct radius_client * client,const char * from_addr,int from_port,struct radius_session * force_sess)1509 static int radius_server_request(struct radius_server_data *data,
1510 struct radius_msg *msg,
1511 struct sockaddr *from, socklen_t fromlen,
1512 struct radius_client *client,
1513 const char *from_addr, int from_port,
1514 struct radius_session *force_sess)
1515 {
1516 struct wpabuf *eap = NULL;
1517 int res, state_included = 0;
1518 u8 statebuf[4];
1519 unsigned int state;
1520 struct radius_session *sess;
1521 struct radius_msg *reply;
1522 int is_complete = 0;
1523
1524 if (force_sess)
1525 sess = force_sess;
1526 else {
1527 res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
1528 sizeof(statebuf));
1529 state_included = res >= 0;
1530 if (res == sizeof(statebuf)) {
1531 state = WPA_GET_BE32(statebuf);
1532 sess = radius_server_get_session(client, state);
1533 } else {
1534 sess = NULL;
1535 }
1536 }
1537
1538 if (sess) {
1539 RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
1540 } else if (state_included) {
1541 RADIUS_DEBUG("State attribute included but no session found");
1542 radius_server_reject(data, client, msg, from, fromlen,
1543 from_addr, from_port);
1544 return -1;
1545 } else {
1546 sess = radius_server_get_new_session(data, client, msg,
1547 from_addr);
1548 if (sess == NULL) {
1549 RADIUS_DEBUG("Could not create a new session");
1550 radius_server_reject(data, client, msg, from, fromlen,
1551 from_addr, from_port);
1552 return -1;
1553 }
1554 }
1555
1556 if (sess->last_from_port == from_port &&
1557 sess->last_identifier == radius_msg_get_hdr(msg)->identifier &&
1558 os_memcmp(sess->last_authenticator,
1559 radius_msg_get_hdr(msg)->authenticator, 16) == 0) {
1560 RADIUS_DEBUG("Duplicate message from %s", from_addr);
1561 data->counters.dup_access_requests++;
1562 client->counters.dup_access_requests++;
1563
1564 if (sess->last_reply) {
1565 struct wpabuf *buf;
1566 buf = radius_msg_get_buf(sess->last_reply);
1567 res = sendto(data->auth_sock, wpabuf_head(buf),
1568 wpabuf_len(buf), 0,
1569 (struct sockaddr *) from, fromlen);
1570 if (res < 0) {
1571 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s",
1572 strerror(errno));
1573 }
1574 return 0;
1575 }
1576
1577 RADIUS_DEBUG("No previous reply available for duplicate "
1578 "message");
1579 return -1;
1580 }
1581
1582 eap = radius_msg_get_eap(msg);
1583 if (eap == NULL && sess->macacl) {
1584 reply = radius_server_macacl(data, client, sess, msg);
1585 if (reply == NULL)
1586 return -1;
1587 goto send_reply;
1588 }
1589 if (eap == NULL) {
1590 RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
1591 from_addr);
1592 data->counters.packets_dropped++;
1593 client->counters.packets_dropped++;
1594 return -1;
1595 }
1596
1597 RADIUS_DUMP("Received EAP data", wpabuf_head(eap), wpabuf_len(eap));
1598
1599 /* FIX: if Code is Request, Success, or Failure, send Access-Reject;
1600 * RFC3579 Sect. 2.6.2.
1601 * Include EAP-Response/Nak with no preferred method if
1602 * code == request.
1603 * If code is not 1-4, discard the packet silently.
1604 * Or is this already done by the EAP state machine? */
1605
1606 wpabuf_free(sess->eap_if->eapRespData);
1607 sess->eap_if->eapRespData = eap;
1608 sess->eap_if->eapResp = TRUE;
1609 eap_server_sm_step(sess->eap);
1610
1611 if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
1612 sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
1613 RADIUS_DUMP("EAP data from the state machine",
1614 wpabuf_head(sess->eap_if->eapReqData),
1615 wpabuf_len(sess->eap_if->eapReqData));
1616 } else if (sess->eap_if->eapFail) {
1617 RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
1618 "set");
1619 } else if (eap_sm_method_pending(sess->eap)) {
1620 radius_msg_free(sess->last_msg);
1621 sess->last_msg = msg;
1622 sess->last_from_port = from_port;
1623 os_free(sess->last_from_addr);
1624 sess->last_from_addr = os_strdup(from_addr);
1625 sess->last_fromlen = fromlen;
1626 os_memcpy(&sess->last_from, from, fromlen);
1627 return -2;
1628 } else {
1629 RADIUS_DEBUG("No EAP data from the state machine - ignore this"
1630 " Access-Request silently (assuming it was a "
1631 "duplicate)");
1632 data->counters.packets_dropped++;
1633 client->counters.packets_dropped++;
1634 return -1;
1635 }
1636
1637 if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
1638 is_complete = 1;
1639 if (sess->eap_if->eapFail) {
1640 srv_log(sess, "EAP authentication failed");
1641 db_update_last_msk(sess, "FAIL");
1642 } else if (sess->eap_if->eapSuccess) {
1643 srv_log(sess, "EAP authentication succeeded");
1644 }
1645
1646 if (sess->eap_if->eapSuccess)
1647 radius_server_hs20_t_c_check(sess, msg);
1648
1649 reply = radius_server_encapsulate_eap(data, client, sess, msg);
1650
1651 send_reply:
1652 if (reply) {
1653 struct wpabuf *buf;
1654 struct radius_hdr *hdr;
1655
1656 RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
1657 if (wpa_debug_level <= MSG_MSGDUMP) {
1658 radius_msg_dump(reply);
1659 }
1660
1661 switch (radius_msg_get_hdr(reply)->code) {
1662 case RADIUS_CODE_ACCESS_ACCEPT:
1663 srv_log(sess, "Sending Access-Accept");
1664 data->counters.access_accepts++;
1665 client->counters.access_accepts++;
1666 break;
1667 case RADIUS_CODE_ACCESS_REJECT:
1668 srv_log(sess, "Sending Access-Reject");
1669 data->counters.access_rejects++;
1670 client->counters.access_rejects++;
1671 break;
1672 case RADIUS_CODE_ACCESS_CHALLENGE:
1673 data->counters.access_challenges++;
1674 client->counters.access_challenges++;
1675 break;
1676 }
1677 buf = radius_msg_get_buf(reply);
1678 res = sendto(data->auth_sock, wpabuf_head(buf),
1679 wpabuf_len(buf), 0,
1680 (struct sockaddr *) from, fromlen);
1681 if (res < 0) {
1682 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s",
1683 strerror(errno));
1684 }
1685 radius_msg_free(sess->last_reply);
1686 sess->last_reply = reply;
1687 sess->last_from_port = from_port;
1688 hdr = radius_msg_get_hdr(msg);
1689 sess->last_identifier = hdr->identifier;
1690 os_memcpy(sess->last_authenticator, hdr->authenticator, 16);
1691 } else {
1692 data->counters.packets_dropped++;
1693 client->counters.packets_dropped++;
1694 }
1695
1696 if (is_complete) {
1697 RADIUS_DEBUG("Removing completed session 0x%x after timeout",
1698 sess->sess_id);
1699 eloop_cancel_timeout(radius_server_session_remove_timeout,
1700 data, sess);
1701 eloop_register_timeout(RADIUS_SESSION_MAINTAIN, 0,
1702 radius_server_session_remove_timeout,
1703 data, sess);
1704 }
1705
1706 return 0;
1707 }
1708
1709
1710 static void
radius_server_receive_disconnect_resp(struct radius_server_data * data,struct radius_client * client,struct radius_msg * msg,int ack)1711 radius_server_receive_disconnect_resp(struct radius_server_data *data,
1712 struct radius_client *client,
1713 struct radius_msg *msg, int ack)
1714 {
1715 struct radius_hdr *hdr;
1716
1717 if (!client->pending_dac_disconnect_req) {
1718 RADIUS_DEBUG("Ignore unexpected Disconnect response");
1719 radius_msg_free(msg);
1720 return;
1721 }
1722
1723 hdr = radius_msg_get_hdr(msg);
1724 if (hdr->identifier != client->pending_dac_disconnect_id) {
1725 RADIUS_DEBUG("Ignore unexpected Disconnect response with unexpected identifier %u (expected %u)",
1726 hdr->identifier,
1727 client->pending_dac_disconnect_id);
1728 radius_msg_free(msg);
1729 return;
1730 }
1731
1732 if (radius_msg_verify(msg, (const u8 *) client->shared_secret,
1733 client->shared_secret_len,
1734 client->pending_dac_disconnect_req, 0)) {
1735 RADIUS_DEBUG("Ignore Disconnect response with invalid authenticator");
1736 radius_msg_free(msg);
1737 return;
1738 }
1739
1740 RADIUS_DEBUG("Disconnect-%s received for " MACSTR,
1741 ack ? "ACK" : "NAK",
1742 MAC2STR(client->pending_dac_disconnect_addr));
1743
1744 radius_msg_free(msg);
1745 radius_msg_free(client->pending_dac_disconnect_req);
1746 client->pending_dac_disconnect_req = NULL;
1747 }
1748
1749
radius_server_receive_coa_resp(struct radius_server_data * data,struct radius_client * client,struct radius_msg * msg,int ack)1750 static void radius_server_receive_coa_resp(struct radius_server_data *data,
1751 struct radius_client *client,
1752 struct radius_msg *msg, int ack)
1753 {
1754 struct radius_hdr *hdr;
1755 #ifdef CONFIG_SQLITE
1756 char addrtxt[3 * ETH_ALEN];
1757 char *sql;
1758 int res;
1759 #endif /* CONFIG_SQLITE */
1760
1761 if (!client->pending_dac_coa_req) {
1762 RADIUS_DEBUG("Ignore unexpected CoA response");
1763 radius_msg_free(msg);
1764 return;
1765 }
1766
1767 hdr = radius_msg_get_hdr(msg);
1768 if (hdr->identifier != client->pending_dac_coa_id) {
1769 RADIUS_DEBUG("Ignore unexpected CoA response with unexpected identifier %u (expected %u)",
1770 hdr->identifier,
1771 client->pending_dac_coa_id);
1772 radius_msg_free(msg);
1773 return;
1774 }
1775
1776 if (radius_msg_verify(msg, (const u8 *) client->shared_secret,
1777 client->shared_secret_len,
1778 client->pending_dac_coa_req, 0)) {
1779 RADIUS_DEBUG("Ignore CoA response with invalid authenticator");
1780 radius_msg_free(msg);
1781 return;
1782 }
1783
1784 RADIUS_DEBUG("CoA-%s received for " MACSTR,
1785 ack ? "ACK" : "NAK",
1786 MAC2STR(client->pending_dac_coa_addr));
1787
1788 radius_msg_free(msg);
1789 radius_msg_free(client->pending_dac_coa_req);
1790 client->pending_dac_coa_req = NULL;
1791
1792 #ifdef CONFIG_SQLITE
1793 if (!data->db)
1794 return;
1795
1796 os_snprintf(addrtxt, sizeof(addrtxt), MACSTR,
1797 MAC2STR(client->pending_dac_coa_addr));
1798
1799 if (ack) {
1800 sql = sqlite3_mprintf("UPDATE current_sessions SET hs20_t_c_filtering=0, waiting_coa_ack=0, coa_ack_received=1 WHERE mac_addr=%Q",
1801 addrtxt);
1802 } else {
1803 sql = sqlite3_mprintf("UPDATE current_sessions SET waiting_coa_ack=0 WHERE mac_addr=%Q",
1804 addrtxt);
1805 }
1806 if (!sql)
1807 return;
1808
1809 res = sqlite3_exec(data->db, sql, NULL, NULL, NULL);
1810 sqlite3_free(sql);
1811 if (res != SQLITE_OK) {
1812 RADIUS_ERROR("Failed to update current_sessions entry: %s",
1813 sqlite3_errmsg(data->db));
1814 return;
1815 }
1816 #endif /* CONFIG_SQLITE */
1817 }
1818
1819
radius_server_receive_auth(int sock,void * eloop_ctx,void * sock_ctx)1820 static void radius_server_receive_auth(int sock, void *eloop_ctx,
1821 void *sock_ctx)
1822 {
1823 struct radius_server_data *data = eloop_ctx;
1824 u8 *buf = NULL;
1825 union {
1826 struct sockaddr_storage ss;
1827 struct sockaddr_in sin;
1828 #ifdef CONFIG_IPV6
1829 struct sockaddr_in6 sin6;
1830 #endif /* CONFIG_IPV6 */
1831 } from;
1832 socklen_t fromlen;
1833 int len;
1834 struct radius_client *client = NULL;
1835 struct radius_msg *msg = NULL;
1836 char abuf[50];
1837 int from_port = 0;
1838
1839 buf = os_malloc(RADIUS_MAX_MSG_LEN);
1840 if (buf == NULL) {
1841 goto fail;
1842 }
1843
1844 fromlen = sizeof(from);
1845 len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
1846 (struct sockaddr *) &from.ss, &fromlen);
1847 if (len < 0) {
1848 wpa_printf(MSG_INFO, "recvfrom[radius_server]: %s",
1849 strerror(errno));
1850 goto fail;
1851 }
1852
1853 #ifdef CONFIG_IPV6
1854 if (data->ipv6) {
1855 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
1856 sizeof(abuf)) == NULL)
1857 abuf[0] = '\0';
1858 from_port = ntohs(from.sin6.sin6_port);
1859 RADIUS_DEBUG("Received %d bytes from %s:%d",
1860 len, abuf, from_port);
1861
1862 client = radius_server_get_client(data,
1863 (struct in_addr *)
1864 &from.sin6.sin6_addr, 1);
1865 }
1866 #endif /* CONFIG_IPV6 */
1867
1868 if (!data->ipv6) {
1869 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
1870 from_port = ntohs(from.sin.sin_port);
1871 RADIUS_DEBUG("Received %d bytes from %s:%d",
1872 len, abuf, from_port);
1873
1874 client = radius_server_get_client(data, &from.sin.sin_addr, 0);
1875 }
1876
1877 RADIUS_DUMP("Received data", buf, len);
1878
1879 if (client == NULL) {
1880 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
1881 data->counters.invalid_requests++;
1882 goto fail;
1883 }
1884
1885 msg = radius_msg_parse(buf, len);
1886 if (msg == NULL) {
1887 RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
1888 data->counters.malformed_access_requests++;
1889 client->counters.malformed_access_requests++;
1890 goto fail;
1891 }
1892
1893 os_free(buf);
1894 buf = NULL;
1895
1896 if (wpa_debug_level <= MSG_MSGDUMP) {
1897 radius_msg_dump(msg);
1898 }
1899
1900 if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_DISCONNECT_ACK) {
1901 radius_server_receive_disconnect_resp(data, client, msg, 1);
1902 return;
1903 }
1904
1905 if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_DISCONNECT_NAK) {
1906 radius_server_receive_disconnect_resp(data, client, msg, 0);
1907 return;
1908 }
1909
1910 if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_COA_ACK) {
1911 radius_server_receive_coa_resp(data, client, msg, 1);
1912 return;
1913 }
1914
1915 if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_COA_NAK) {
1916 radius_server_receive_coa_resp(data, client, msg, 0);
1917 return;
1918 }
1919
1920 if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) {
1921 RADIUS_DEBUG("Unexpected RADIUS code %d",
1922 radius_msg_get_hdr(msg)->code);
1923 data->counters.unknown_types++;
1924 client->counters.unknown_types++;
1925 goto fail;
1926 }
1927
1928 data->counters.access_requests++;
1929 client->counters.access_requests++;
1930
1931 if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
1932 client->shared_secret_len, NULL)) {
1933 RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf);
1934 data->counters.bad_authenticators++;
1935 client->counters.bad_authenticators++;
1936 goto fail;
1937 }
1938
1939 if (radius_server_request(data, msg, (struct sockaddr *) &from,
1940 fromlen, client, abuf, from_port, NULL) ==
1941 -2)
1942 return; /* msg was stored with the session */
1943
1944 fail:
1945 radius_msg_free(msg);
1946 os_free(buf);
1947 }
1948
1949
radius_server_receive_acct(int sock,void * eloop_ctx,void * sock_ctx)1950 static void radius_server_receive_acct(int sock, void *eloop_ctx,
1951 void *sock_ctx)
1952 {
1953 struct radius_server_data *data = eloop_ctx;
1954 u8 *buf = NULL;
1955 union {
1956 struct sockaddr_storage ss;
1957 struct sockaddr_in sin;
1958 #ifdef CONFIG_IPV6
1959 struct sockaddr_in6 sin6;
1960 #endif /* CONFIG_IPV6 */
1961 } from;
1962 socklen_t fromlen;
1963 int len, res;
1964 struct radius_client *client = NULL;
1965 struct radius_msg *msg = NULL, *resp = NULL;
1966 char abuf[50];
1967 int from_port = 0;
1968 struct radius_hdr *hdr;
1969 struct wpabuf *rbuf;
1970
1971 buf = os_malloc(RADIUS_MAX_MSG_LEN);
1972 if (buf == NULL) {
1973 goto fail;
1974 }
1975
1976 fromlen = sizeof(from);
1977 len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
1978 (struct sockaddr *) &from.ss, &fromlen);
1979 if (len < 0) {
1980 wpa_printf(MSG_INFO, "recvfrom[radius_server]: %s",
1981 strerror(errno));
1982 goto fail;
1983 }
1984
1985 #ifdef CONFIG_IPV6
1986 if (data->ipv6) {
1987 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
1988 sizeof(abuf)) == NULL)
1989 abuf[0] = '\0';
1990 from_port = ntohs(from.sin6.sin6_port);
1991 RADIUS_DEBUG("Received %d bytes from %s:%d",
1992 len, abuf, from_port);
1993
1994 client = radius_server_get_client(data,
1995 (struct in_addr *)
1996 &from.sin6.sin6_addr, 1);
1997 }
1998 #endif /* CONFIG_IPV6 */
1999
2000 if (!data->ipv6) {
2001 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
2002 from_port = ntohs(from.sin.sin_port);
2003 RADIUS_DEBUG("Received %d bytes from %s:%d",
2004 len, abuf, from_port);
2005
2006 client = radius_server_get_client(data, &from.sin.sin_addr, 0);
2007 }
2008
2009 RADIUS_DUMP("Received data", buf, len);
2010
2011 if (client == NULL) {
2012 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
2013 data->counters.invalid_acct_requests++;
2014 goto fail;
2015 }
2016
2017 msg = radius_msg_parse(buf, len);
2018 if (msg == NULL) {
2019 RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
2020 data->counters.malformed_acct_requests++;
2021 client->counters.malformed_acct_requests++;
2022 goto fail;
2023 }
2024
2025 os_free(buf);
2026 buf = NULL;
2027
2028 if (wpa_debug_level <= MSG_MSGDUMP) {
2029 radius_msg_dump(msg);
2030 }
2031
2032 if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCOUNTING_REQUEST) {
2033 RADIUS_DEBUG("Unexpected RADIUS code %d",
2034 radius_msg_get_hdr(msg)->code);
2035 data->counters.unknown_acct_types++;
2036 client->counters.unknown_acct_types++;
2037 goto fail;
2038 }
2039
2040 data->counters.acct_requests++;
2041 client->counters.acct_requests++;
2042
2043 if (radius_msg_verify_acct_req(msg, (u8 *) client->shared_secret,
2044 client->shared_secret_len)) {
2045 RADIUS_DEBUG("Invalid Authenticator from %s", abuf);
2046 data->counters.acct_bad_authenticators++;
2047 client->counters.acct_bad_authenticators++;
2048 goto fail;
2049 }
2050
2051 /* TODO: Write accounting information to a file or database */
2052
2053 hdr = radius_msg_get_hdr(msg);
2054
2055 resp = radius_msg_new(RADIUS_CODE_ACCOUNTING_RESPONSE, hdr->identifier);
2056 if (resp == NULL)
2057 goto fail;
2058
2059 radius_msg_finish_acct_resp(resp, (u8 *) client->shared_secret,
2060 client->shared_secret_len,
2061 hdr->authenticator);
2062
2063 RADIUS_DEBUG("Reply to %s:%d", abuf, from_port);
2064 if (wpa_debug_level <= MSG_MSGDUMP) {
2065 radius_msg_dump(resp);
2066 }
2067 rbuf = radius_msg_get_buf(resp);
2068 data->counters.acct_responses++;
2069 client->counters.acct_responses++;
2070 res = sendto(data->acct_sock, wpabuf_head(rbuf), wpabuf_len(rbuf), 0,
2071 (struct sockaddr *) &from.ss, fromlen);
2072 if (res < 0) {
2073 wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s",
2074 strerror(errno));
2075 }
2076
2077 fail:
2078 radius_msg_free(resp);
2079 radius_msg_free(msg);
2080 os_free(buf);
2081 }
2082
2083
radius_server_disable_pmtu_discovery(int s)2084 static int radius_server_disable_pmtu_discovery(int s)
2085 {
2086 int r = -1;
2087 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
2088 /* Turn off Path MTU discovery on IPv4/UDP sockets. */
2089 int action = IP_PMTUDISC_DONT;
2090 r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
2091 sizeof(action));
2092 if (r == -1)
2093 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
2094 "%s", strerror(errno));
2095 #endif
2096 return r;
2097 }
2098
2099
radius_server_open_socket(int port)2100 static int radius_server_open_socket(int port)
2101 {
2102 int s;
2103 struct sockaddr_in addr;
2104
2105 s = socket(PF_INET, SOCK_DGRAM, 0);
2106 if (s < 0) {
2107 wpa_printf(MSG_INFO, "RADIUS: socket: %s", strerror(errno));
2108 return -1;
2109 }
2110
2111 radius_server_disable_pmtu_discovery(s);
2112
2113 os_memset(&addr, 0, sizeof(addr));
2114 addr.sin_family = AF_INET;
2115 addr.sin_port = htons(port);
2116 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
2117 wpa_printf(MSG_INFO, "RADIUS: bind: %s", strerror(errno));
2118 close(s);
2119 return -1;
2120 }
2121
2122 return s;
2123 }
2124
2125
2126 #ifdef CONFIG_IPV6
radius_server_open_socket6(int port)2127 static int radius_server_open_socket6(int port)
2128 {
2129 int s;
2130 struct sockaddr_in6 addr;
2131
2132 s = socket(PF_INET6, SOCK_DGRAM, 0);
2133 if (s < 0) {
2134 wpa_printf(MSG_INFO, "RADIUS: socket[IPv6]: %s",
2135 strerror(errno));
2136 return -1;
2137 }
2138
2139 os_memset(&addr, 0, sizeof(addr));
2140 addr.sin6_family = AF_INET6;
2141 os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any));
2142 addr.sin6_port = htons(port);
2143 if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
2144 wpa_printf(MSG_INFO, "RADIUS: bind: %s", strerror(errno));
2145 close(s);
2146 return -1;
2147 }
2148
2149 return s;
2150 }
2151 #endif /* CONFIG_IPV6 */
2152
2153
radius_server_free_sessions(struct radius_server_data * data,struct radius_session * sessions)2154 static void radius_server_free_sessions(struct radius_server_data *data,
2155 struct radius_session *sessions)
2156 {
2157 struct radius_session *session, *prev;
2158
2159 session = sessions;
2160 while (session) {
2161 prev = session;
2162 session = session->next;
2163 radius_server_session_free(data, prev);
2164 }
2165 }
2166
2167
radius_server_free_clients(struct radius_server_data * data,struct radius_client * clients)2168 static void radius_server_free_clients(struct radius_server_data *data,
2169 struct radius_client *clients)
2170 {
2171 struct radius_client *client, *prev;
2172
2173 client = clients;
2174 while (client) {
2175 prev = client;
2176 client = client->next;
2177
2178 radius_server_free_sessions(data, prev->sessions);
2179 os_free(prev->shared_secret);
2180 radius_msg_free(prev->pending_dac_coa_req);
2181 radius_msg_free(prev->pending_dac_disconnect_req);
2182 os_free(prev);
2183 }
2184 }
2185
2186
2187 static struct radius_client *
radius_server_read_clients(const char * client_file,int ipv6)2188 radius_server_read_clients(const char *client_file, int ipv6)
2189 {
2190 FILE *f;
2191 const int buf_size = 1024;
2192 char *buf, *pos;
2193 struct radius_client *clients, *tail, *entry;
2194 int line = 0, mask, failed = 0, i;
2195 struct in_addr addr;
2196 #ifdef CONFIG_IPV6
2197 struct in6_addr addr6;
2198 #endif /* CONFIG_IPV6 */
2199 unsigned int val;
2200
2201 f = fopen(client_file, "r");
2202 if (f == NULL) {
2203 RADIUS_ERROR("Could not open client file '%s'", client_file);
2204 return NULL;
2205 }
2206
2207 buf = os_malloc(buf_size);
2208 if (buf == NULL) {
2209 fclose(f);
2210 return NULL;
2211 }
2212
2213 clients = tail = NULL;
2214 while (fgets(buf, buf_size, f)) {
2215 /* Configuration file format:
2216 * 192.168.1.0/24 secret
2217 * 192.168.1.2 secret
2218 * fe80::211:22ff:fe33:4455/64 secretipv6
2219 */
2220 line++;
2221 buf[buf_size - 1] = '\0';
2222 pos = buf;
2223 while (*pos != '\0' && *pos != '\n')
2224 pos++;
2225 if (*pos == '\n')
2226 *pos = '\0';
2227 if (*buf == '\0' || *buf == '#')
2228 continue;
2229
2230 pos = buf;
2231 while ((*pos >= '0' && *pos <= '9') || *pos == '.' ||
2232 (*pos >= 'a' && *pos <= 'f') || *pos == ':' ||
2233 (*pos >= 'A' && *pos <= 'F')) {
2234 pos++;
2235 }
2236
2237 if (*pos == '\0') {
2238 failed = 1;
2239 break;
2240 }
2241
2242 if (*pos == '/') {
2243 char *end;
2244 *pos++ = '\0';
2245 mask = strtol(pos, &end, 10);
2246 if ((pos == end) ||
2247 (mask < 0 || mask > (ipv6 ? 128 : 32))) {
2248 failed = 1;
2249 break;
2250 }
2251 pos = end;
2252 } else {
2253 mask = ipv6 ? 128 : 32;
2254 *pos++ = '\0';
2255 }
2256
2257 if (!ipv6 && inet_aton(buf, &addr) == 0) {
2258 failed = 1;
2259 break;
2260 }
2261 #ifdef CONFIG_IPV6
2262 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) {
2263 if (inet_pton(AF_INET, buf, &addr) <= 0) {
2264 failed = 1;
2265 break;
2266 }
2267 /* Convert IPv4 address to IPv6 */
2268 if (mask <= 32)
2269 mask += (128 - 32);
2270 os_memset(addr6.s6_addr, 0, 10);
2271 addr6.s6_addr[10] = 0xff;
2272 addr6.s6_addr[11] = 0xff;
2273 os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr,
2274 4);
2275 }
2276 #endif /* CONFIG_IPV6 */
2277
2278 while (*pos == ' ' || *pos == '\t') {
2279 pos++;
2280 }
2281
2282 if (*pos == '\0') {
2283 failed = 1;
2284 break;
2285 }
2286
2287 entry = os_zalloc(sizeof(*entry));
2288 if (entry == NULL) {
2289 failed = 1;
2290 break;
2291 }
2292 entry->shared_secret = os_strdup(pos);
2293 if (entry->shared_secret == NULL) {
2294 failed = 1;
2295 os_free(entry);
2296 break;
2297 }
2298 entry->shared_secret_len = os_strlen(entry->shared_secret);
2299 if (!ipv6) {
2300 entry->addr.s_addr = addr.s_addr;
2301 val = 0;
2302 for (i = 0; i < mask; i++)
2303 val |= 1U << (31 - i);
2304 entry->mask.s_addr = htonl(val);
2305 }
2306 #ifdef CONFIG_IPV6
2307 if (ipv6) {
2308 int offset = mask / 8;
2309
2310 os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16);
2311 os_memset(entry->mask6.s6_addr, 0xff, offset);
2312 val = 0;
2313 for (i = 0; i < (mask % 8); i++)
2314 val |= 1 << (7 - i);
2315 if (offset < 16)
2316 entry->mask6.s6_addr[offset] = val;
2317 }
2318 #endif /* CONFIG_IPV6 */
2319
2320 if (tail == NULL) {
2321 clients = tail = entry;
2322 } else {
2323 tail->next = entry;
2324 tail = entry;
2325 }
2326 }
2327
2328 if (failed) {
2329 RADIUS_ERROR("Invalid line %d in '%s'", line, client_file);
2330 radius_server_free_clients(NULL, clients);
2331 clients = NULL;
2332 }
2333
2334 os_free(buf);
2335 fclose(f);
2336
2337 return clients;
2338 }
2339
2340
2341 /**
2342 * radius_server_init - Initialize RADIUS server
2343 * @conf: Configuration for the RADIUS server
2344 * Returns: Pointer to private RADIUS server context or %NULL on failure
2345 *
2346 * This initializes a RADIUS server instance and returns a context pointer that
2347 * will be used in other calls to the RADIUS server module. The server can be
2348 * deinitialize by calling radius_server_deinit().
2349 */
2350 struct radius_server_data *
radius_server_init(struct radius_server_conf * conf)2351 radius_server_init(struct radius_server_conf *conf)
2352 {
2353 struct radius_server_data *data;
2354
2355 #ifndef CONFIG_IPV6
2356 if (conf->ipv6) {
2357 wpa_printf(MSG_ERROR, "RADIUS server compiled without IPv6 support");
2358 return NULL;
2359 }
2360 #endif /* CONFIG_IPV6 */
2361
2362 data = os_zalloc(sizeof(*data));
2363 if (data == NULL)
2364 return NULL;
2365
2366 data->auth_sock = -1;
2367 data->acct_sock = -1;
2368 dl_list_init(&data->erp_keys);
2369 os_get_reltime(&data->start_time);
2370 data->conf_ctx = conf->conf_ctx;
2371 data->eap_sim_db_priv = conf->eap_sim_db_priv;
2372 data->ssl_ctx = conf->ssl_ctx;
2373 data->msg_ctx = conf->msg_ctx;
2374 data->ipv6 = conf->ipv6;
2375 if (conf->pac_opaque_encr_key) {
2376 data->pac_opaque_encr_key = os_malloc(16);
2377 if (data->pac_opaque_encr_key) {
2378 os_memcpy(data->pac_opaque_encr_key,
2379 conf->pac_opaque_encr_key, 16);
2380 }
2381 }
2382 if (conf->eap_fast_a_id) {
2383 data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len);
2384 if (data->eap_fast_a_id) {
2385 os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id,
2386 conf->eap_fast_a_id_len);
2387 data->eap_fast_a_id_len = conf->eap_fast_a_id_len;
2388 }
2389 }
2390 if (conf->eap_fast_a_id_info)
2391 data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info);
2392 data->eap_fast_prov = conf->eap_fast_prov;
2393 data->pac_key_lifetime = conf->pac_key_lifetime;
2394 data->pac_key_refresh_time = conf->pac_key_refresh_time;
2395 data->eap_teap_auth = conf->eap_teap_auth;
2396 data->eap_teap_pac_no_inner = conf->eap_teap_pac_no_inner;
2397 data->get_eap_user = conf->get_eap_user;
2398 data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
2399 data->eap_sim_id = conf->eap_sim_id;
2400 data->tnc = conf->tnc;
2401 data->wps = conf->wps;
2402 data->pwd_group = conf->pwd_group;
2403 data->server_id = conf->server_id;
2404 if (conf->eap_req_id_text) {
2405 data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len);
2406 if (data->eap_req_id_text) {
2407 os_memcpy(data->eap_req_id_text, conf->eap_req_id_text,
2408 conf->eap_req_id_text_len);
2409 data->eap_req_id_text_len = conf->eap_req_id_text_len;
2410 }
2411 }
2412 data->erp = conf->erp;
2413 data->erp_domain = conf->erp_domain;
2414 data->tls_session_lifetime = conf->tls_session_lifetime;
2415 data->tls_flags = conf->tls_flags;
2416
2417 if (conf->subscr_remediation_url) {
2418 data->subscr_remediation_url =
2419 os_strdup(conf->subscr_remediation_url);
2420 }
2421 data->subscr_remediation_method = conf->subscr_remediation_method;
2422 if (conf->hs20_sim_provisioning_url)
2423 data->hs20_sim_provisioning_url =
2424 os_strdup(conf->hs20_sim_provisioning_url);
2425
2426 if (conf->t_c_server_url)
2427 data->t_c_server_url = os_strdup(conf->t_c_server_url);
2428
2429 #ifdef CONFIG_SQLITE
2430 if (conf->sqlite_file) {
2431 if (sqlite3_open(conf->sqlite_file, &data->db)) {
2432 RADIUS_ERROR("Could not open SQLite file '%s'",
2433 conf->sqlite_file);
2434 radius_server_deinit(data);
2435 return NULL;
2436 }
2437 }
2438 #endif /* CONFIG_SQLITE */
2439
2440 #ifdef CONFIG_RADIUS_TEST
2441 if (conf->dump_msk_file)
2442 data->dump_msk_file = os_strdup(conf->dump_msk_file);
2443 #endif /* CONFIG_RADIUS_TEST */
2444
2445 data->clients = radius_server_read_clients(conf->client_file,
2446 conf->ipv6);
2447 if (data->clients == NULL) {
2448 wpa_printf(MSG_ERROR, "No RADIUS clients configured");
2449 radius_server_deinit(data);
2450 return NULL;
2451 }
2452
2453 #ifdef CONFIG_IPV6
2454 if (conf->ipv6)
2455 data->auth_sock = radius_server_open_socket6(conf->auth_port);
2456 else
2457 #endif /* CONFIG_IPV6 */
2458 data->auth_sock = radius_server_open_socket(conf->auth_port);
2459 if (data->auth_sock < 0) {
2460 wpa_printf(MSG_ERROR, "Failed to open UDP socket for RADIUS authentication server");
2461 radius_server_deinit(data);
2462 return NULL;
2463 }
2464 if (eloop_register_read_sock(data->auth_sock,
2465 radius_server_receive_auth,
2466 data, NULL)) {
2467 radius_server_deinit(data);
2468 return NULL;
2469 }
2470
2471 if (conf->acct_port) {
2472 #ifdef CONFIG_IPV6
2473 if (conf->ipv6)
2474 data->acct_sock = radius_server_open_socket6(
2475 conf->acct_port);
2476 else
2477 #endif /* CONFIG_IPV6 */
2478 data->acct_sock = radius_server_open_socket(conf->acct_port);
2479 if (data->acct_sock < 0) {
2480 wpa_printf(MSG_ERROR, "Failed to open UDP socket for RADIUS accounting server");
2481 radius_server_deinit(data);
2482 return NULL;
2483 }
2484 if (eloop_register_read_sock(data->acct_sock,
2485 radius_server_receive_acct,
2486 data, NULL)) {
2487 radius_server_deinit(data);
2488 return NULL;
2489 }
2490 } else {
2491 data->acct_sock = -1;
2492 }
2493
2494 return data;
2495 }
2496
2497
2498 /**
2499 * radius_server_erp_flush - Flush all ERP keys
2500 * @data: RADIUS server context from radius_server_init()
2501 */
radius_server_erp_flush(struct radius_server_data * data)2502 void radius_server_erp_flush(struct radius_server_data *data)
2503 {
2504 struct eap_server_erp_key *erp;
2505
2506 if (data == NULL)
2507 return;
2508 while ((erp = dl_list_first(&data->erp_keys, struct eap_server_erp_key,
2509 list)) != NULL) {
2510 dl_list_del(&erp->list);
2511 bin_clear_free(erp, sizeof(*erp));
2512 }
2513 }
2514
2515
2516 /**
2517 * radius_server_deinit - Deinitialize RADIUS server
2518 * @data: RADIUS server context from radius_server_init()
2519 */
radius_server_deinit(struct radius_server_data * data)2520 void radius_server_deinit(struct radius_server_data *data)
2521 {
2522 if (data == NULL)
2523 return;
2524
2525 if (data->auth_sock >= 0) {
2526 eloop_unregister_read_sock(data->auth_sock);
2527 close(data->auth_sock);
2528 }
2529
2530 if (data->acct_sock >= 0) {
2531 eloop_unregister_read_sock(data->acct_sock);
2532 close(data->acct_sock);
2533 }
2534
2535 radius_server_free_clients(data, data->clients);
2536
2537 os_free(data->pac_opaque_encr_key);
2538 os_free(data->eap_fast_a_id);
2539 os_free(data->eap_fast_a_id_info);
2540 os_free(data->eap_req_id_text);
2541 #ifdef CONFIG_RADIUS_TEST
2542 os_free(data->dump_msk_file);
2543 #endif /* CONFIG_RADIUS_TEST */
2544 os_free(data->subscr_remediation_url);
2545 os_free(data->hs20_sim_provisioning_url);
2546 os_free(data->t_c_server_url);
2547
2548 #ifdef CONFIG_SQLITE
2549 if (data->db)
2550 sqlite3_close(data->db);
2551 #endif /* CONFIG_SQLITE */
2552
2553 radius_server_erp_flush(data);
2554
2555 os_free(data);
2556 }
2557
2558
2559 /**
2560 * radius_server_get_mib - Get RADIUS server MIB information
2561 * @data: RADIUS server context from radius_server_init()
2562 * @buf: Buffer for returning the MIB data in text format
2563 * @buflen: buf length in octets
2564 * Returns: Number of octets written into buf
2565 */
radius_server_get_mib(struct radius_server_data * data,char * buf,size_t buflen)2566 int radius_server_get_mib(struct radius_server_data *data, char *buf,
2567 size_t buflen)
2568 {
2569 int ret, uptime;
2570 unsigned int idx;
2571 char *end, *pos;
2572 struct os_reltime now;
2573 struct radius_client *cli;
2574
2575 /* RFC 2619 - RADIUS Authentication Server MIB */
2576
2577 if (data == NULL || buflen == 0)
2578 return 0;
2579
2580 pos = buf;
2581 end = buf + buflen;
2582
2583 os_get_reltime(&now);
2584 uptime = (now.sec - data->start_time.sec) * 100 +
2585 ((now.usec - data->start_time.usec) / 10000) % 100;
2586 ret = os_snprintf(pos, end - pos,
2587 "RADIUS-AUTH-SERVER-MIB\n"
2588 "radiusAuthServIdent=hostapd\n"
2589 "radiusAuthServUpTime=%d\n"
2590 "radiusAuthServResetTime=0\n"
2591 "radiusAuthServConfigReset=4\n",
2592 uptime);
2593 if (os_snprintf_error(end - pos, ret)) {
2594 *pos = '\0';
2595 return pos - buf;
2596 }
2597 pos += ret;
2598
2599 ret = os_snprintf(pos, end - pos,
2600 "radiusAuthServTotalAccessRequests=%u\n"
2601 "radiusAuthServTotalInvalidRequests=%u\n"
2602 "radiusAuthServTotalDupAccessRequests=%u\n"
2603 "radiusAuthServTotalAccessAccepts=%u\n"
2604 "radiusAuthServTotalAccessRejects=%u\n"
2605 "radiusAuthServTotalAccessChallenges=%u\n"
2606 "radiusAuthServTotalMalformedAccessRequests=%u\n"
2607 "radiusAuthServTotalBadAuthenticators=%u\n"
2608 "radiusAuthServTotalPacketsDropped=%u\n"
2609 "radiusAuthServTotalUnknownTypes=%u\n"
2610 "radiusAccServTotalRequests=%u\n"
2611 "radiusAccServTotalInvalidRequests=%u\n"
2612 "radiusAccServTotalResponses=%u\n"
2613 "radiusAccServTotalMalformedRequests=%u\n"
2614 "radiusAccServTotalBadAuthenticators=%u\n"
2615 "radiusAccServTotalUnknownTypes=%u\n",
2616 data->counters.access_requests,
2617 data->counters.invalid_requests,
2618 data->counters.dup_access_requests,
2619 data->counters.access_accepts,
2620 data->counters.access_rejects,
2621 data->counters.access_challenges,
2622 data->counters.malformed_access_requests,
2623 data->counters.bad_authenticators,
2624 data->counters.packets_dropped,
2625 data->counters.unknown_types,
2626 data->counters.acct_requests,
2627 data->counters.invalid_acct_requests,
2628 data->counters.acct_responses,
2629 data->counters.malformed_acct_requests,
2630 data->counters.acct_bad_authenticators,
2631 data->counters.unknown_acct_types);
2632 if (os_snprintf_error(end - pos, ret)) {
2633 *pos = '\0';
2634 return pos - buf;
2635 }
2636 pos += ret;
2637
2638 for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) {
2639 char abuf[50], mbuf[50];
2640 #ifdef CONFIG_IPV6
2641 if (data->ipv6) {
2642 if (inet_ntop(AF_INET6, &cli->addr6, abuf,
2643 sizeof(abuf)) == NULL)
2644 abuf[0] = '\0';
2645 if (inet_ntop(AF_INET6, &cli->mask6, mbuf,
2646 sizeof(mbuf)) == NULL)
2647 mbuf[0] = '\0';
2648 }
2649 #endif /* CONFIG_IPV6 */
2650 if (!data->ipv6) {
2651 os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf));
2652 os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf));
2653 }
2654
2655 ret = os_snprintf(pos, end - pos,
2656 "radiusAuthClientIndex=%u\n"
2657 "radiusAuthClientAddress=%s/%s\n"
2658 "radiusAuthServAccessRequests=%u\n"
2659 "radiusAuthServDupAccessRequests=%u\n"
2660 "radiusAuthServAccessAccepts=%u\n"
2661 "radiusAuthServAccessRejects=%u\n"
2662 "radiusAuthServAccessChallenges=%u\n"
2663 "radiusAuthServMalformedAccessRequests=%u\n"
2664 "radiusAuthServBadAuthenticators=%u\n"
2665 "radiusAuthServPacketsDropped=%u\n"
2666 "radiusAuthServUnknownTypes=%u\n"
2667 "radiusAccServTotalRequests=%u\n"
2668 "radiusAccServTotalInvalidRequests=%u\n"
2669 "radiusAccServTotalResponses=%u\n"
2670 "radiusAccServTotalMalformedRequests=%u\n"
2671 "radiusAccServTotalBadAuthenticators=%u\n"
2672 "radiusAccServTotalUnknownTypes=%u\n",
2673 idx,
2674 abuf, mbuf,
2675 cli->counters.access_requests,
2676 cli->counters.dup_access_requests,
2677 cli->counters.access_accepts,
2678 cli->counters.access_rejects,
2679 cli->counters.access_challenges,
2680 cli->counters.malformed_access_requests,
2681 cli->counters.bad_authenticators,
2682 cli->counters.packets_dropped,
2683 cli->counters.unknown_types,
2684 cli->counters.acct_requests,
2685 cli->counters.invalid_acct_requests,
2686 cli->counters.acct_responses,
2687 cli->counters.malformed_acct_requests,
2688 cli->counters.acct_bad_authenticators,
2689 cli->counters.unknown_acct_types);
2690 if (os_snprintf_error(end - pos, ret)) {
2691 *pos = '\0';
2692 return pos - buf;
2693 }
2694 pos += ret;
2695 }
2696
2697 return pos - buf;
2698 }
2699
2700
radius_server_get_eap_user(void * ctx,const u8 * identity,size_t identity_len,int phase2,struct eap_user * user)2701 static int radius_server_get_eap_user(void *ctx, const u8 *identity,
2702 size_t identity_len, int phase2,
2703 struct eap_user *user)
2704 {
2705 struct radius_session *sess = ctx;
2706 struct radius_server_data *data = sess->server;
2707 int ret;
2708
2709 ret = data->get_eap_user(data->conf_ctx, identity, identity_len,
2710 phase2, user);
2711 if (ret == 0 && user) {
2712 sess->accept_attr = user->accept_attr;
2713 sess->remediation = user->remediation;
2714 sess->macacl = user->macacl;
2715 sess->t_c_timestamp = user->t_c_timestamp;
2716 }
2717
2718 if (ret) {
2719 RADIUS_DEBUG("%s: User-Name not found from user database",
2720 __func__);
2721 }
2722
2723 return ret;
2724 }
2725
2726
radius_server_get_eap_req_id_text(void * ctx,size_t * len)2727 static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len)
2728 {
2729 struct radius_session *sess = ctx;
2730 struct radius_server_data *data = sess->server;
2731 *len = data->eap_req_id_text_len;
2732 return data->eap_req_id_text;
2733 }
2734
2735
radius_server_log_msg(void * ctx,const char * msg)2736 static void radius_server_log_msg(void *ctx, const char *msg)
2737 {
2738 struct radius_session *sess = ctx;
2739 srv_log(sess, "EAP: %s", msg);
2740 }
2741
2742
2743 #ifdef CONFIG_ERP
2744
radius_server_get_erp_domain(void * ctx)2745 static const char * radius_server_get_erp_domain(void *ctx)
2746 {
2747 struct radius_session *sess = ctx;
2748 struct radius_server_data *data = sess->server;
2749
2750 return data->erp_domain;
2751 }
2752
2753
2754 static struct eap_server_erp_key *
radius_server_erp_get_key(void * ctx,const char * keyname)2755 radius_server_erp_get_key(void *ctx, const char *keyname)
2756 {
2757 struct radius_session *sess = ctx;
2758 struct radius_server_data *data = sess->server;
2759
2760 return radius_server_erp_find_key(data, keyname);
2761 }
2762
2763
radius_server_erp_add_key(void * ctx,struct eap_server_erp_key * erp)2764 static int radius_server_erp_add_key(void *ctx, struct eap_server_erp_key *erp)
2765 {
2766 struct radius_session *sess = ctx;
2767 struct radius_server_data *data = sess->server;
2768
2769 dl_list_add(&data->erp_keys, &erp->list);
2770 return 0;
2771 }
2772
2773 #endif /* CONFIG_ERP */
2774
2775
2776 static const struct eapol_callbacks radius_server_eapol_cb =
2777 {
2778 .get_eap_user = radius_server_get_eap_user,
2779 .get_eap_req_id_text = radius_server_get_eap_req_id_text,
2780 .log_msg = radius_server_log_msg,
2781 #ifdef CONFIG_ERP
2782 .get_erp_send_reauth_start = NULL,
2783 .get_erp_domain = radius_server_get_erp_domain,
2784 .erp_get_key = radius_server_erp_get_key,
2785 .erp_add_key = radius_server_erp_add_key,
2786 #endif /* CONFIG_ERP */
2787 };
2788
2789
2790 /**
2791 * radius_server_eap_pending_cb - Pending EAP data notification
2792 * @data: RADIUS server context from radius_server_init()
2793 * @ctx: Pending EAP context pointer
2794 *
2795 * This function is used to notify EAP server module that a pending operation
2796 * has been completed and processing of the EAP session can proceed.
2797 */
radius_server_eap_pending_cb(struct radius_server_data * data,void * ctx)2798 void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx)
2799 {
2800 struct radius_client *cli;
2801 struct radius_session *s, *sess = NULL;
2802 struct radius_msg *msg;
2803
2804 if (data == NULL)
2805 return;
2806
2807 for (cli = data->clients; cli; cli = cli->next) {
2808 for (s = cli->sessions; s; s = s->next) {
2809 if (s->eap == ctx && s->last_msg) {
2810 sess = s;
2811 break;
2812 }
2813 }
2814 if (sess)
2815 break;
2816 }
2817
2818 if (sess == NULL) {
2819 RADIUS_DEBUG("No session matched callback ctx");
2820 return;
2821 }
2822
2823 msg = sess->last_msg;
2824 sess->last_msg = NULL;
2825 eap_sm_pending_cb(sess->eap);
2826 if (radius_server_request(data, msg,
2827 (struct sockaddr *) &sess->last_from,
2828 sess->last_fromlen, cli,
2829 sess->last_from_addr,
2830 sess->last_from_port, sess) == -2)
2831 return; /* msg was stored with the session */
2832
2833 radius_msg_free(msg);
2834 }
2835
2836
2837 #ifdef CONFIG_SQLITE
2838
2839 struct db_session_fields {
2840 char *identity;
2841 char *nas;
2842 int hs20_t_c_filtering;
2843 int waiting_coa_ack;
2844 int coa_ack_received;
2845 };
2846
2847
get_db_session_fields(void * ctx,int argc,char * argv[],char * col[])2848 static int get_db_session_fields(void *ctx, int argc, char *argv[], char *col[])
2849 {
2850 struct db_session_fields *fields = ctx;
2851 int i;
2852
2853 for (i = 0; i < argc; i++) {
2854 if (!argv[i])
2855 continue;
2856
2857 RADIUS_DEBUG("Session DB: %s=%s", col[i], argv[i]);
2858
2859 if (os_strcmp(col[i], "identity") == 0) {
2860 os_free(fields->identity);
2861 fields->identity = os_strdup(argv[i]);
2862 } else if (os_strcmp(col[i], "nas") == 0) {
2863 os_free(fields->nas);
2864 fields->nas = os_strdup(argv[i]);
2865 } else if (os_strcmp(col[i], "hs20_t_c_filtering") == 0) {
2866 fields->hs20_t_c_filtering = atoi(argv[i]);
2867 } else if (os_strcmp(col[i], "waiting_coa_ack") == 0) {
2868 fields->waiting_coa_ack = atoi(argv[i]);
2869 } else if (os_strcmp(col[i], "coa_ack_received") == 0) {
2870 fields->coa_ack_received = atoi(argv[i]);
2871 }
2872 }
2873
2874 return 0;
2875 }
2876
2877
free_db_session_fields(struct db_session_fields * fields)2878 static void free_db_session_fields(struct db_session_fields *fields)
2879 {
2880 os_free(fields->identity);
2881 fields->identity = NULL;
2882 os_free(fields->nas);
2883 fields->nas = NULL;
2884 }
2885
2886 #endif /* CONFIG_SQLITE */
2887
2888
radius_server_dac_request(struct radius_server_data * data,const char * req)2889 int radius_server_dac_request(struct radius_server_data *data, const char *req)
2890 {
2891 #ifdef CONFIG_SQLITE
2892 char *sql;
2893 int res;
2894 int disconnect;
2895 const char *pos = req;
2896 u8 addr[ETH_ALEN];
2897 char addrtxt[3 * ETH_ALEN];
2898 int t_c_clear = 0;
2899 struct db_session_fields fields;
2900 struct sockaddr_in das;
2901 struct radius_client *client;
2902 struct radius_msg *msg;
2903 struct wpabuf *buf;
2904 u8 identifier;
2905 struct os_time now;
2906
2907 if (!data)
2908 return -1;
2909
2910 /* req: <disconnect|coa> <MAC Address> [t_c_clear] */
2911
2912 if (os_strncmp(pos, "disconnect ", 11) == 0) {
2913 disconnect = 1;
2914 pos += 11;
2915 } else if (os_strncmp(req, "coa ", 4) == 0) {
2916 disconnect = 0;
2917 pos += 4;
2918 } else {
2919 return -1;
2920 }
2921
2922 if (hwaddr_aton(pos, addr))
2923 return -1;
2924 pos = os_strchr(pos, ' ');
2925 if (pos) {
2926 if (os_strstr(pos, "t_c_clear"))
2927 t_c_clear = 1;
2928 }
2929
2930 if (!disconnect && !t_c_clear) {
2931 RADIUS_ERROR("DAC request for CoA without any authorization change");
2932 return -1;
2933 }
2934
2935 if (!data->db) {
2936 RADIUS_ERROR("SQLite database not in use");
2937 return -1;
2938 }
2939
2940 os_snprintf(addrtxt, sizeof(addrtxt), MACSTR, MAC2STR(addr));
2941
2942 sql = sqlite3_mprintf("SELECT * FROM current_sessions WHERE mac_addr=%Q",
2943 addrtxt);
2944 if (!sql)
2945 return -1;
2946
2947 os_memset(&fields, 0, sizeof(fields));
2948 res = sqlite3_exec(data->db, sql, get_db_session_fields, &fields, NULL);
2949 sqlite3_free(sql);
2950 if (res != SQLITE_OK) {
2951 RADIUS_ERROR("Failed to find matching current_sessions entry from sqlite database: %s",
2952 sqlite3_errmsg(data->db));
2953 free_db_session_fields(&fields);
2954 return -1;
2955 }
2956
2957 if (!fields.nas) {
2958 RADIUS_ERROR("No NAS information found from current_sessions");
2959 free_db_session_fields(&fields);
2960 return -1;
2961 }
2962
2963 os_memset(&das, 0, sizeof(das));
2964 das.sin_family = AF_INET;
2965 das.sin_addr.s_addr = inet_addr(fields.nas);
2966 das.sin_port = htons(3799);
2967
2968 free_db_session_fields(&fields);
2969
2970 client = radius_server_get_client(data, &das.sin_addr, 0);
2971 if (!client) {
2972 RADIUS_ERROR("No NAS information available to protect the packet");
2973 return -1;
2974 }
2975
2976 identifier = client->next_dac_identifier++;
2977
2978 msg = radius_msg_new(disconnect ? RADIUS_CODE_DISCONNECT_REQUEST :
2979 RADIUS_CODE_COA_REQUEST, identifier);
2980 if (!msg)
2981 return -1;
2982
2983 os_snprintf(addrtxt, sizeof(addrtxt), RADIUS_802_1X_ADDR_FORMAT,
2984 MAC2STR(addr));
2985 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
2986 (u8 *) addrtxt, os_strlen(addrtxt))) {
2987 RADIUS_ERROR("Could not add Calling-Station-Id");
2988 radius_msg_free(msg);
2989 return -1;
2990 }
2991
2992 if (!disconnect && t_c_clear) {
2993 u8 val[4] = { 0x00, 0x00, 0x00, 0x00 }; /* E=0 */
2994
2995 if (!radius_msg_add_wfa(
2996 msg, RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING,
2997 val, sizeof(val))) {
2998 RADIUS_DEBUG("Failed to add WFA-HS20-T-C-Filtering");
2999 radius_msg_free(msg);
3000 return -1;
3001 }
3002 }
3003
3004 os_get_time(&now);
3005 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_EVENT_TIMESTAMP,
3006 now.sec)) {
3007 RADIUS_ERROR("Failed to add Event-Timestamp attribute");
3008 radius_msg_free(msg);
3009 return -1;
3010 }
3011
3012 radius_msg_finish_acct(msg, (u8 *) client->shared_secret,
3013 client->shared_secret_len);
3014
3015 if (wpa_debug_level <= MSG_MSGDUMP)
3016 radius_msg_dump(msg);
3017
3018 buf = radius_msg_get_buf(msg);
3019 if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0,
3020 (struct sockaddr *) &das, sizeof(das)) < 0) {
3021 RADIUS_ERROR("Failed to send packet - sendto: %s",
3022 strerror(errno));
3023 radius_msg_free(msg);
3024 return -1;
3025 }
3026
3027 if (disconnect) {
3028 radius_msg_free(client->pending_dac_disconnect_req);
3029 client->pending_dac_disconnect_req = msg;
3030 client->pending_dac_disconnect_id = identifier;
3031 os_memcpy(client->pending_dac_disconnect_addr, addr, ETH_ALEN);
3032 } else {
3033 radius_msg_free(client->pending_dac_coa_req);
3034 client->pending_dac_coa_req = msg;
3035 client->pending_dac_coa_id = identifier;
3036 os_memcpy(client->pending_dac_coa_addr, addr, ETH_ALEN);
3037 }
3038
3039 return 0;
3040 #else /* CONFIG_SQLITE */
3041 return -1;
3042 #endif /* CONFIG_SQLITE */
3043 }
3044